Nigel J. Collar
Leventis Fellow in Conservation Biology, BirdLife International
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This page provides a list of publications with PDFs of most papers. File sizes are indicated where these are greater than 1 Mb, to warn of lengthy downloads.

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PAPERS, NOTES
AND ESSAYS
On (bird) conservation assessment, evaluation, priorities and strategy
On the IUCN Red List and its criteria
On Red Data Book values
On conservation philosophy, practice and captive breeding
On scientific collecting
On taxonomy and (usually) conservation (see also under “parrots”)
On bird conservation (areas, habitats, forest guilds, family groups)
On threatened bird species and their conservation
On bustard ecology and conservation
On parrots and parrot conservation
On other birds
On bird people
     
  BOOKS Books on birds
Volumes edited
Volume translated
Contributions to books on birds or bird conservation
       
 
PAPERS, NOTES AND ESSAYS
   
  On (bird) conservation assessment, evaluation, priorities and strategy
   
 
  • Collar, N. (1994) Extinction, endangerment and everything. World Birdwatch 16(2): 6-9. [Condensed version in Kenya Birds 3: 81-83.] Download PDF (1.7 Mb)

  • Crosby, M. J., Stattersfield, A. J., Collar, N. J. & Bibby, C. J. (1996) Predicting avian extinction rates. Biodiversity Letters 2: 182-185. Download PDF

  • Collar, N. J. (1997) The threat status of the Sidamo Lark. Bull. Brit. Orn. Club 117: 75-76. Download PDF

  • Collar, N. J. (1997) Species survival versus perpetuation of myth: the case of the Philippine Eagle. Oryx 31: 4-7. Download PDF (1.1 Mb)

  • Collar, N. J. (1998) Extinction by assumption: or, the Romeo Error on Cebu. Oryx 32: 239-243. Download PDF (1.7 Mb)

  • Mace, G. M. & Collar, N. J. (2002) Priority-setting in species conservation. Pp.61-73 in K. Norris & D. J. Pain, eds. Conserving bird biodiversity: general principles and their application. Cambridge: Cambridge University Press (Conservation Biology Series no.7). Download PDF (2.6 Mb)

  • Collar, N. J. & Rudyanto (2003) The archive and the ark: bird specimen data in conservation status assessment. Bull. Brit. Orn. Club 123A: 95-113. Download PDF

  • Adams, M. P., Cooper, J. H. & Collar, N. J. (2003) Extinct and endangered (“E&E”) birds: a proposed list for collections catalogues. Bull. Brit. Orn. Club 123A.: 338-354. Download PDF

  • Butchart, S. H. M., Stattersfield, A. J. & Collar, N. J. (2006) How many bird extinctions have we prevented? Oryx 40: 266-278. Download PDF

  • Collar, N. J. (2006) Discovering, documenting and defining species: the quest for shared programmes, protocols and principles. DVD contribution enclosed with Proceedings of the International Conference: Biodiversity—Science and Governance (Paris, 24–28 January 2005). Paris: Muséum National d’Histoire Naturelle. Download PDF

  • Eaton, J. A., Shepherd, C. R., Rheindt, F. E., Harris, J. B. C., van Balen, S. (B.), Wilcove, D. S. & Collar, N. J. (2015 [2016]) Trade-driven extinctions and near-extinctions of avian taxa in Sundaic Indonesia. Forktail 31: 1-12. Download PDF
   
  On the IUCN Red List and its criteria
   
 
  • Mace, G., Collar, N., Cooke, J., Gaston, K., Ginsberg, J., Leader-Williams, N., Maunder, M. & Milner-Gulland, E. J. (1993) The development of new criteria for listing species on the IUCN Red List. Species 19: 16-22. Download PDF (1.9 Mb)

  • Mace, G. M. & Collar, N. J. (1994) Extinction risk assessment for birds through quantitative criteria. Ibis 137: S240-246. Download PDF (2.1 Mb)

  • Collar, N. J. (1999) Risk indicators and status assessment in birds. Pp.13-28 [“foreword” = guest essay] in J. del Hoyo, A. D. Elliott & J. Sargatal, eds. Handbook of the birds of the world, 5. Barcelona: Lynx Edicions.

  • Akçakaya, R., Baillie, J., Collar, N., Gärdenfors, U., Gaston, K., Irvin, B., Keith, D., Lande, R., Leader-Williams, N., Lusty, C., Mace, G., Master, L., Milner-Gulland, E. J., Molur, S., Powles, H., Punt, A., Rodríguez, J. P., Seddon, M., Stattersfield, A. & Yahara, T. (1999) IUCN Red List criteria review provisional report: draft of the proposed changes and recommendations. Species 31-32: 43-57. Download PDF (3.4 Mb)

  • Hilton-Taylor, C., Mace, G. M., Capper, D. R., Collar, N. J., Stuart, S. N., Bibby, C. J., Pollock, C. & Thomsen, J. B. (2000) Assessment mismatches must be sorted out: they leave species at risk. Nature 404: 541. Download PDF

  • Lamoreux, J., Akçakaya, H. R., Bennun, L., Collar, N. J., Boitani, L., Brackett, D., Bräutigam, A., Brooks, T. M., da Fonseca, G. A. B., Mittermeier, R. A., Rylands, A. B., Gärdenfors, U., Hilton-Taylor, C., Mace, G., Stein, B. A. & Stuart, S. (2003) Value of the IUCN Red List. Trends in Ecology and Evolution 18: 214-215. Download PDF

  • Brooks, T. M., Collar, N. J., Green, R. E., Marsden, S. J. & Pain, D. J. (2008) The science of bird conservation. Bird Conserv. Internatn. 18 (suppl.1): S2-S12.

  • Collar, N. J. & Sykes, B. R. (2009) Lost, found and saved—OBC conservation: the next 25 years. BirdingASIA 11: 41-46. Download PDF

  • Hoffmann, M. & 173 other authors including Collar, N. J. (2010) The impact of conservation on the status of the world’s vertebrates. Science 330: 1503-1509. Download PDF

  • Collar, N. J., Butchart, S. H. M., Brooks, T. M., Mittermeier, R. A. & Stuart, S. N. (2011) Biodiversity: blessing not blunder. BioScience 61: 254. Download PDF

  • Mace, G. M., Collar, N. J., Gaston, K. J., Hilton-Taylor, C., Akçakaya, H. R., Leader-Williams, N., Milner-Gulland, E. J. & Stuart, S. N. (2008) Quantification of extinction risk: IUCN’s system for classifying threatened species. Conserv. Biol. 22: 1424-1442. Download PDF
   
  On Red Data Book values
   
 
  • Collar, N. J. (1987) Red Data Books and national conservation strategies. World Birdwatch 9 (2): 6-7. Download PDF

  • Collar, N. J. (1991) Red Data Books: how and why. AFA Watchbird 18(4): 13-16. Download PDF (2 Mb)

  • Collar, N. J. (1994) Red Data Books, Action Plans, and the need for site-specific synthesis. Species 21-22: 132-133. Download PDF

  • Collar, N. J. (1996) The reasons for Red Data Books. Oryx 30: 121-130. Download PDF (2.7 Mb)
   
  On conservation philosophy, practice and captive breeding
   
 
  • Collar, N. J. (1986) Species are a measure of man’s freedom: reflections after writing a Red Data Book on African birds. Oryx 20: 15-19. Download PDF (1.5 Mb)
    [French translation published in Le Courrier de la Nature 110 (1987): 30-35. Download PDF 2.1 Mb]

  • Collar, N. J. (1988) Life, liberty and the pursuit of happiness. Amer. Birds 42: 19-22. Download PDF (1.4 Mb)

  • Collar, N. J. (2003) Beyond value: biodiversity and the freedom of the mind. Global Ecology and Biogeography 12: 265-269. Download PDF

  • Collar, N. J., Gardner, L., Jeggo, D. F., Marcordes, B., Owen, A., Pagel, T., Pes, T., Vaidl, A., Wilkinson, R. & Wirth, R. (2012) Captive breeding and the most threatened birds in Asia. BirdingASIA 18: 50-57. Download PDF

  • Collar, N. J. & Butchart, S. H. M. (2014) Conservation breeding and avian diversity: chances and challenges. Internatn. Zoo Yearbook 48: 7-28. Download PDF

  • Collar, N. J., Lierz, M., Stanley Price, M. R. & Wirth, R. [Z.] (2015) Releases of confiscated and captive-bred parrots. Oryx 49: 202-203. Download PDF

    Dolman, P. M., Scotland, K. M., Collar, N. J. & Burnside, R. J. (2015) Ark or park: the need to predict relative effectiveness of ex situ and in situ conservation before attempting captive breeding. J. Appl. Ecol. 52: 841-850. Download PDF
   
  On scientific collecting
   
 
  • Collar, N. J. (1994) Bannerman and the Black Oystercatcher. Brit. Birds 87: 492. Download PDF

  • Collar, N. J. (1998) Undiscovered country: the non-collection of the Somali shrike. Bull. African Bird Club 5: 136-137. Download PDF

  • Collar, N. J. (2003) British conservationists and museum scientists. Auk 120: 222-223. Download PDF

  • Collar, N. J. (1999) New species, high standards and the case of Laniarius liberatus. Ibis 141: 358-367. Download PDF (3.6 Mb)

  • Collar, N. J. (2000) Collecting and conservation: cause and effect. Bird Conserv. Internatn. 10: 1-15. Download PDF

  • Collar, N. J. (2009) ‘New bird descriptions without proper voucher specimens’: further to Kannan. J. Bombay Nat. Hist. Soc. 105: 222-223. Download PDF

  • Collar, N. J. (2009) New species in photographs: risks, rights and responsibilities. BirdingASIA 12: 36-37. Download PDF
   
  On taxonomy and (usually) conservation (see also under "parrots")
   
 
  • Collar, N. J. & Violani, C. G. (1984) Specimens of Calandrella obbiensis and Sarothrura ayresi in Milan Museum. Bull. Brit. Orn. Club 104: 113-114. Download PDF

  • Stuart, S. N. & Collar, N. J. (1985) Subspeciation in the Karamoja Apalis Apalis karamojae. Bull. Brit. Orn. Club 105: 86-89. Download PDF

  • Collar, N. J. & Tattersall, I. (1987) J. T. Last and the type-locality of Benson’s Rockthrush Monticola bensoni. Bull. Brit. Orn. Club 107: 55-59. Download PDF (1 Mb)

  • Collar, N. J. & Long, A. J. (1996) Taxonomy and names of Carpococcyx cuckoos from the Greater Sundas. Forktail 11: 135-150. Download PDF (2.7 Mb)

  • Collar, N. J. (1996) Species concepts and conservation: a response to Hazevoet. Bird Conserv. Internatn. 6: 197-200. Download PDF

  • Collar, N. J. (1997) Taxonomy and conservation: chicken and egg. Bull. Brit. Orn. Club 117: 122-136. Download PDF (3.3 Mb)

  • Collar, N. J. (1998) Monotypy in Francolinus griseostriatus. Bull. Brit. Orn. Club 118: 124-126.

  • Collar, N. J. & van Balen, S. (2002) The Blue-tailed Trogon Harpactes (Apalharpactes) reinwardtii: species limits and conservation status. Forktail 18: 121-125. Download PDF

  • Collar, N. J. (2003) How many bird species are there in Asia? Oriental Bird Club Bull. 38: 20-30. Download PDF (3.2 Mb)

  • Collar, N. J. (2004) Asian enigmas: four odd “thrushes”. BirdingASIA 1: 18-21. Download PDF (1.1 Mb)

  • Collar, N. J. (2004) Species limits in some Indonesian thrushes. Forktail 20: 71-87. Download PDF

  • Collar, N. J. (2004) Subspecies of Taiwan birds—first impressions. BirdingASIA 2: 34-52. Download PDF (5.9 Mb)

  • Collar, N. J. (2005) Changes in species-level taxonomy of Asian birds in 2004, with other notes. BirdingASIA 3: 35-40. Download PDF (1.6 Mb)

  • Collar, N. J. & Spottiswoode, C. N. (2005) Species limits in birds: a response to Watson. BioScience 55: 388-389. Download PDF

  • Collar, N. J. (2006) A partial revision of the Asian babblers (Timaliidae). Forktail 22: 85-112. Download PDF

  • Collar, N. J. (2006) A taxonomic reappraisal of the Black-browed Barbet Megalaima oorti. Forktail 22: 170-173. Download PDF

  • Collar, N. J. & Fishpool, L. D. C. (2006) What is Pogoniulus makawai? Bull. African Bird Club 13: 18-27. Download PDF

  • Fishpool, L. D. C. & Collar, N. J. (2006) The taxonomic and conservation status of Chapin’s Crombec Sylvietta chapini. Bull. African Bird Club 13: 130-135. Download PDF

  • Collar, N. J. (2006) Systematic notes on Asian birds. 59. Taxonomy as tar-baby: the type locality and nomenclature of the Mindanao Bleeding-heart Gallicolumba crinigera (Pucheran, 1853). Zool. Verh. 80: 193-202. Download PDF

  • Collar, N. J. (2007) Philippine bird taxonomy and conservation: a commentary on Peterson (2006). Bird Conserv. Internatn. 17: 103-113. Download PDF

  • Collar, N. J. & Pilgrim, J. D. (2007) Species-level changes proposed for Asian birds, 2005–2006. BirdingASIA 8: 14-30. Download PDF

  • Collar, N. J. (2008) Subjectivity and space in evaluating species limits: a response to Peterson and Moyle. Forktail 24: 112-113. Download PDF

  • Collar, N. J. & Eames, J. C. (2008) Head colour and sex-size dimorphism in Pseudibis papillosa and P. davisoni. BirdingASIA 10: 36-42. Download PDF

  • Collar, N. J., Dingle, C., Gabremichael, M. N. & Spottiswoode, C. N. (2009) Taxonomic status of the Degodi Lark Mirafra degodiensis, with notes on the voice of Gillett’s Lark M. gilletti. Bull. Brit. Orn. Club 129: 49-62. Download PDF

  • Pilgrim, J. D., Inskipp, T. P. & Collar, N. J. (2009) Species-level changes suggested for Asian birds, 2007–2008. BirdingASIA 12: 18-35. Download PDF

  • Collar, N. J. (2009) Hainan Peacock-pheasant: another CR species for the IUCN Red List? G@llinformed 2: 14-19. Download PDF

  • Hille, S. M. & Collar, N. J. (2009) The taxonomic and conservation status of Milvus kites in the Cape Verde archipelago: further (and final?) reflections. Bull. Brit. Orn. Club 129: 217-221. Download PDF

  • Tobias, J. A., Seddon, N., Spottiswoode, C. N., Pilgrim, J. P., Fishpool, L. D. C. & Collar, N. J. (2010) Quantitative criteria for species delimitation. Ibis 152: 724-746. Download PDF

  • Melo, M., Bowie, R. C. K., Voelker, G., Dallimer, M., Collar, N. J. & Jones, P. J. (2010) Multiple lines of evidence support the recognition of a very rare bird species—the Príncipe Thrush. J. Zool. 282: 120-129. Download PDF

  • Inskipp, T. P., Collar, N. J. & Pilgrim, J. D. (2010) Species-level and other changes suggested for Asian birds, 2009. BirdingASIA 14: 59-67. Download PDF

  • Collar, N. J. (2011) Species limits in some Philippine birds including the Greater Flameback Chrysocolaptes lucidus. Forktail 27: 29-38. Download PDF

  • Collar, N. J. (2011) Taxonomic notes on some Asian babblers (Timaliidae). Forktail 27: 100-102. Download PDF

  • Collar, N. J. & Bird, J. P. (2011) Phenotypic discrimination of the Andean Ibis (Theristicus branickii). Wilson J. Orn. 123: 459-463. Download PDF

  • Donald, P. F. & Collar, N. J. (2011) Notes on the structure and plumage of Beesley’s Lark Chersomanes [albofasciata] beesleyi. Bull. African Bird Club 18: 168-173. Download PDF

  • Inskipp, T. P., Collar, N. J., Mahood, S. P. & Pilgrim, J. D. (2011) Species-level and other interesting changes suggested for Asian birds, 2010. BirdingASIA 16: 51-61. Download PDF

  • Collar, N. J. & Inskipp, T. P. (2012) Species-level and other changes proposed for Asian birds, 2011. BirdingASIA 18: 33-43. Download PDF

  • Rasmussen, P. C., Allen, D. N. S., Collar, N. J., Demeulemeester, B., Hutchinson, R. O., Jakosalem, P. G. C., Kennedy, R. S., Lambert, F. R. & Paguntalan, L. M. (2012) Vocal divergence and new species in the Philippine Hawk Owl Ninox philippensis complex. Forktail 28: 1-20. Download PDF | Download plate

  • Collar, N. J. (2013) A species is whatever I say it is. Brit. Birds 106: 130-142. Download PDF

  • Collar, N. J. & Salaman, P. G. W. (2013) The taxonomic and conservation status of the Oxypogon helmetcrests. Conservación Colombiana 19: 31-38. Download PDF

  • Collar, N. J., Eaton, J. A. & Hutchinson, R. O. (2013) Species limits in the Golden Bulbul Alophoixus (Thapsinillas) affinis complex. Forktail 29: 19-24. Download PDF

  • Gonzalez, J.-C. T., Sheldon, B. C., Collar, N. J. & Tobias, J. A. (2013a) A comprehensive molecular phylogeny for the hornbills (Aves: Bucerotidae). Molec. Phylogen. Evol. 67: 468-483. Download PDF

  • Gonzalez, J.-C. T., Sheldon, B. C., Collar, N. J. & Tobias, J. A. (2013b) Corrigendum to ‘A comprehensive molecular phylogeny for the hornbills (Aves: Bucerotidae)’ [Mol. Phylogenet. Evol. 67 (2013): 468-483]. Molec. Phylogen. Evol. 68: 715. Download PDF

  • Inskipp, T. P., Collar, N. J., Pilgrim, J. D. & Mahood, S. P. (2013) Species-level and other interesting changes proposed for Asian birds, 2012. BirdingASIA 20: 53-63. Download PDF

  • Katzner, T. E. & Collar, N. J. (2013) Are insular populations of the Philippine Falconet (Microhierax erythrogenys) steps in a cline? Condor 115: 576-583. Download PDF

  • Rasmussen, P. C. & Collar, N. J. (2013) Phenotypic evidence for the specific and generic validity of Heteroglaux blewitti. Forktail 29: 78-87. Download PDF

  • Collar, N. J. (2014) Blue-wattled Bulbul Pycnonotus nieuwenhuisii and Black-browed Babbler Malacocincla perspicillata: two Sundaic passerines in search of a life. BirdingASIA 21: 37-44. Download PDF

  • Collar, N. J. & Marsden, S. J. (2014) The subspecies of Yellow-crested Cockatoo Cacatua sulphurea. Forktail 30: 23-27. Download PDF

  • Collar, N. J. & Prys-Jones, R. P. (2014) Lophura ignita macartneyi revisited. Forktail 30: 135-138. Download PDF

  • Collar, N. J. & Inskipp, T. P. (2014) Notable taxonomic changes proposed for Asian birds in 2013. BirdingASIA 22: 37-47. Download PDF

  • Inskipp, T. P. & Collar, N. J. (2015) Notable taxonomic changes proposed for Asian birds in 2014. BirdingASIA 24: 64-71. Download PDF

  • del Hoyo, J. & Collar, N. J. (2015) Fakten und Fiktion zur Scoring-Methode nach Tobias: eine Antwort an Prof. Martens. Falke 62(3): 30-31. Download PDF

  • Collar, N. J., Fishpool, L. D. C., del Hoyo, J., Pilgrim, J. D., Seddon, N., Spottiswoode, C. N. & Tobias, J. A. (2016) Towards a scoring system for species delimitation: a response to Remsen. J. Field Orn. 87: 104-110. Download PDF

  • Collar, N. J., del Hoyo, J. & Jutglar, F. (2015 [2016]) The number of species and subspecies in the Red-bellied Pitta Erythropitta erythrogaster complex: a quantitative analysis of morphological characters. Forktail 31: 13-23. Download PDF

  • Eaton, J. A. & Collar, N. J. (2015 [2016]) The taxonomic status of Pycnonotus bimaculatus snouckaerti. Forktail 31: 107-110. Download PDF

  • Kirwan, G. M. & Collar, N. J. (2016) ‘The foremost ornithological mystery of Costa Rica’: Amazilia alfaroana Underwood, 1896. Zootaxa 4189(2): 244-250. Download PDF

  • Collar, N. (2016) The ultimate list. BirdLife the Magazine 38(4): 38-39. Download PDF

  • Burfield, I. J., Butchart, S. H. M. & Collar, N. J. (2017) BirdLife, conservation and taxonomy. Bird Conserv. Internatn. 27: 1-5. Download PDF
   
  On bird conservation (areas, habitat, forest guilds, family groups)
   
 
  • Collar, N. J. (1986) The best-kept secret in Brazil. World Birdwatch 8(2): 14-15. Download PDF

  • Collar, N. J., Dee, T. J. & Goriup P. D. (1987) La conservation de la nature à Madagascar: la perspective du CIPO. Pp. 97-108 in R. A. Mittermeier, L. H. Rakotovao, V. Randrianasolo, E. J. Sterling & D. Devitre, eds. Priorités en matière de conservation des espèces à Madagascar. Gland, Switzerland: International Union for Conservation of Nature and Natural Resources (Occ. Pap. 2). Download PDF (4.6 Mb)

  • Stuart, S. N. & Collar, N. J. (1988) Birds at risk in Africa and related islands: the causes of their rarity and decline. Proc. VI Pan-Afr. Orn. Congr.: 1-25. Download PDF (5.3 Mb)

  • Collar, N. J. (1990) The Amazon as ark. World Birdwatch 12(1-2): 10-12. Download PDF (1.3 Mb)

  • Collar, N. J. (1996) The conservation of grassland birds: towards a global perspective. Pp.9-18 in J. Fernández Gutiérrez & J. Sanz-Zuasti, eds. Conservación de las aves esteparias y su hábitat. Valladolid: Junta de Castilla y León. Download PDF (5.4 Mb)

  • Collar, N. J., Wege, D. C. & Long, A. J. (1997) Patterns and causes of endangerment in the New World avifauna. Pp.237-260 in J. V. Remsen, ed. Studies in Neotropical ornithology honoring Ted Parker. Washington, D.C.: American Ornithologists’ Union (Orn. Monogr. 48). Download PDF (4.9 Mb)

  • Brooks, T. M., Pimm, S. L. & Collar, N. J. (1997) Deforestation predicts the number of threatened birds in insular South-East Asia. Conserv. Biol. 11: 382-394. Download PDF (4.2 Mb)

  • Collar, N. J. (2001) Asian birds on the brink. Oriental Bird Club Bull. 34: 60-65. Download PDF (1.9 Mb)

  • Lambert, F. R. & Collar, N. J. (2002) The future for Sundaic lowland forest birds: long-term effects of commercial logging and fragmentation. Forktail 18: 127-146. Download PDF

  • Mallari, N. A. D., Crosby, M. J. & Collar, N. J. (2004) Unexplored Philippine forests as revealed by point-locality mapping. Forktail 20: 124-128. Download PDF (1.5 Mb)

  • Butchart, S. H. M., Collar, N. J., Crosby, M. J. & Tobias, J. A. (2005) “Lost” and poorly known birds: top targets for birders in Asia. BirdingASIA 3: 41-49. Download PDF (2.7 Mb)

  • Tobias, J. A., Butchart, S. H. M. & Collar, N. J. (2006) Lost and found: a gap analysis for the Neotropical avifauna. Neotropical Birding 1: 4-22. Download PDF

  • Hille, S. M. & Collar, N. J. (2011) Raptor status assessment in the Cape Verde Islands confirms major crisis in scavengers. Oryx 45: 217-224. Download PDF

  • Mallari, N. A. D., Collar, N. J., Lee, D. C., McGowan, P. J. K., Wilkinson, R. & Marsden, S. J. (2011) Population estimates of understorey birds across a habitat gradient in Palawan, Philippines: implications for conservation. Oryx 45: 234-242. Download PDF

  • Española, C. P., Collar, N. J. & Marsden, S. J. (2013) Are populations of large-bodied avian frugivores on Luzon, Philippines, facing imminent collapse? Anim. Conserv. 16: 467-479. Download PDF

  • Mallari, N. A. D., Collar, N. J., McGowan, P. J. K. & Marsden, S. J. (2013) Science-driven management of protected areas: a Philippine case study. Env. Mgmt. 51: 1236-1246. Download PDF

  • Mallari, N. A. D., Collar, N. J., McGowan, P. J. K. & Marsden, S. J. (2016) Philippine protected areas are not meeting the biodiversity coverage and management effectiveness requirements of Aichi Target 11. Ambio 45: 313-322. Download PDF

  • Española, C. P., Collar, N. J., Mallari, N. A. D. & Marsden, S. J. (2016) Large avian frugivores in the Philippines show linear responses to improvements in forest quality. Forest Ecol. & Mgmt. 375: 127-133. Download PDF
   
  On threatened bird species and their conservation
   
 
  • Collar, N. J., Round, P. D. & Wells, D. R. (1986) The past and future of Gurney’s Pitta Pitta gurneyi. Forktail 1: 29-51. Download PDF (4.7 Mb)

  • Collar, N. J. & Gonzaga, L. A. P. (1988) O mutum Crax blumenbachii na Reserva Florestal Particular de Linhares - ES. Espaço, Ambiente e Planejamento (CVRD/GEAMAM) 2(8). Download PDF (5 Mb)

  • Collar, N. J. (1993) The conservation status in 1982 of the Aldabra White-throated Rail Dryolimnas cuvieri aldabranus. Bird Conserv. Internatn. 3: 299-305. Download PDF (1.6 Mb)

  • Collar, N. J. & Wege, D. C. (1995) The distribution and conservation status of the Bearded Tachuri Polystictus pectoralis. Bird Conserv. Internatn. 5: 367-390. Download PDF (5.8 Mb)

  • Collar, N. J. (1996) The Philippine Eagle: one hundred years of solitude. Oriental Bird Club Bull. 24: 30-31.

  • Collar, N. J. (1997) The Philippine Eagle on its hundredth birthday. Raptor 24: 29-31. Download PDF

  • Collar, N. J. (1998) Bill morphology and the identification of Isabela Orioles Oriolus isabellae. Forktail 14: 82-84. Download PDF

  • Rasmussen, P. C. & Collar, N. J. (1998) Identification, distribution and status of the Forest Owlet Heteroglaux (Athene) blewitti. Forktail 14: 41-49. Download PDF

  • Rasmussen, P. C. & Collar, N. J. (1999) Major specimen fraud in the Forest Owlet Heteroglaux (Athene auct.) blewitti. Ibis 141: 11-21. Download PDF (3.5 Mb)

  • Collar, N. J., Scharlemann, J. P. W. & Fisher, C. T. (2000) Max E. G. Bartels and the Javan Lapwing Vanellus macropterus. Kukila 11: 122-124. Download PDF

  • Long, A. J. & Collar, N. J. (2002) Distribution, status and natural history of the Bornean Ground Cuckoo Carpococcyx radiatus. Forktail 18: 111-119. Download PDF

  • Collar, N. J. (2003) A third Philippine specimen of Chinese Crested-tern Sterna bernsteini. Forktail 19: 151. Download PDF

  • van Balen, S., Collar, N. J., Liley, D. & Rudyanto (2005) The White-breasted Babbler Stachyris grammiceps of Java: natural history and conservation status, especially on Gunung Halimun. Forktail 21: 139-146. Download PDF

  • Watson, M., Wilson, J. M., Koshkin, M., Sherbakov, B., Karpov, F., Gavrilov, A., Schielzeth, H., Brombacher, M., Collar, N. J. & Cresswell, W. (2006) Nest survival and productivity of the critically endangered Sociable Lapwing. Ibis 148: 489-502. Download PDF

  • Collar, N. J., Dellelegn Abebe, Y., Fishpool, L. D. C., Gabremichael, M. N., Spottiswoode, C. N. & Wondafrash, M. (2008) Type locality, habitat, behaviour, voice, nest, eggs and plight of the Sidamo Lark Heteromirafra sidamoensis. Bull. African Bird Club 15: 180-190. Download PDF

  • Mellanby, R. J., Ross, B., Watt, A., Wondafrash, M., Ewnetu, M., Broadhurst, C., Critchlow, R., Dadesa, A., Deas, T., Enawgaw, C., Gebremedhin, B., Graham, E., Maclean, S., McKean, M., Collar, N. J. & Spottiswoode, C. N. (2008) Distribution, abundance and habitat preferences of White-tailed Swallow Hirundo megaensis and Ethiopian Bush-crow Zavattariornis stresemanni, two southern Ethiopian endemics. Bird Conserv. Internatn. 18: 395-412. Download PDF

  • Allen, D. N. S. & Collar, N. J. (2008) Rallus mirificus and Mimizuku gurneyi deleted from the avifauna of Samar, Philippines. Forktail 24: 113-115. Download PDF

  • Keo, O., Collar, N. J. & Sutherland, W. J. (2009) Nest-protectors provide a cost-effective means of increasing breeding success in Giant Ibis Thaumatibis gigantea. Bird Conserv. Internatn. 19: 77-82. Download PDF

  • Spottiswoode, C. N., Wondafrash, M., Gabremichael, M. N., Dellelegn Abebe, Y., Mwangi, M. A. K., Collar, N. J. & Dolman, P. M. (2009) Rangeland degradation is poised to cause Africa’s first recorded avian extinction. Anim. Conserv. 12: 249-257. Download PDF

  • Donald, P. F., Buchanan, G. M., Collar, N. J., Dellelegn Abebe, Y., Gabremichael, M. N., Mwangi, M. A. K., Ndang’ang’a, P. K., Spottiswoode, C. N. & Wondafrash, M. (2010) Rapid declines in habitat quality and population size confirm the impending extinction of the Sidamo (Liben) Lark Heteromirafra sidamoensis. Bird Conserv. Internatn. 20: 1-12. Download PDF

  • Dallimer, M., Melo, M., Collar, N. J. & Jones, P. J. (2010) The Príncipe Thrush Turdus xanthorhynchus: a newly split, Critically Endangered, forest flagship species. Bird Conserv. Internatn. 20: 375-381. Download PDF

  • Gonzaga, L. P. & Collar, N. J. (2010) A nest of the Banded Cotinga Cotinga maculata. Cotinga 32: 165-166. Download PDF

  • Wright, H. L., Bou Vorsak, Collar, N. J., Gray, T. N. E., Lake, I. R., Sum Phearun, Rainey, H. J., Rours Vann, Sok Ko & Dolman, P. M. (2010) Establishing a national monitoring programme for White-shouldered Ibis in Cambodia. Ibis 152: 206-208. Download PDF

  • Ieronymidou, C., Collar, N. J. & Dolman, P. M. (2012) Endemic Cyprus Warbler Sylvia melanothorax and colonizing Sardinian Warbler S. melanocephala show differential habitat associations in Cyprus. Ibis 154: 248-259. Download PDF

  • Wright, H. L., Collar, N. J., Lake, I. R., Net Norin, Rours Vann, Sok Ko, Sum Phearun & Dolman, P. M. (2012) First census of white-shouldered ibis Pseudibis davisoni reveals mismatch with Cambodia’s protected area system. Oryx 46: 236-239. Download PDF

  • Donald, P. F., Gedeon, K., Collar, N. J., Spottiswoode, C. N., Wondafrash, M. & Buchanan, G. M. (2012) The restricted range of the Ethiopian Bush-crow Zavattariornis stresemanni is a consequence of high reliance on modified habitats within narrow climatic limits. J. Orn. 153: 1031-1044. Download PDF

  • Ieronymidou, C., Collar, N. J. & Dolman, P. M. (2012) Endemic Cyprus Warbler Sylvia melanothorax and colonizing Sardinian Warbler S. melanocephala show differential habitat associations in Cyprus. Ibis 154: 248-259. Download PDF

  • Wright, H. L., Collar, N. J., Lake, I. R., Net Norin, Rours Vann, Sok Ko, Sum Phearun & Dolman, P. M. (2012) First census of white-shouldered ibis Pseudibis davisoni reveals mismatch with Cambodia’s protected area system. Oryx 46: 236-239. Download PDF

  • Wright, H. L., Collar, N. J., Lake, I. R., Bou Vorsak & Dolman, P. M. (2012) Foraging ecology of sympatric White-shouldered Ibis Pseudibis davisoni and Giant Ibis Thaumatibis gigantea in northern Cambodia. Forktail 28: 93-100. Download PDF

  • Allen, D. N. S. & Collar, N. J. (2013) Giant Scops Owl Otus (Mimizuku) gurneyi restored to the Samar avifauna. BirdingASIA 19: 59-60. Download PDF

  • Collar, N. J. & van Balen, S. (2013) Notes for the conservation of the Rufous-fronted Laughingthrush Garrulax rufifrons. Forktail 29: 15-18. Download PDF

  • Collar, N. J. & Lambert, F. R. (2013) The elusive Negros Fruit-dove Ptilinopus arcanus sixty years on. BirdingASIA 19: 38-41. Download PDF

  • Jakosalem, P. G. C., Collar, N. J. & Gill, J. A. (2013) Habitat selection and conservation status of the endemic Ninox hawk-owl on Cebu, Philippines. Bird Conserv. Internatn. 23: 360–370. Download PDF

  • Spottiswoode, C. N., Olsson, U., Mills, M. S. L., Cohen, C., Francis, J. E., Toye, N., Hoddinott, D., Dagne, Wood, C., Donald, P. F., Collar, N. J. & & Alström, P. (2013) Rediscovery of a long-lost lark reveals the conspecificity of endangered Heteromirafra populations in the Horn of Africa. J. Orn. 154: 813-825. Download PDF

  • Wright, H. L., Collar, N. J., Lake, I. R., Net Norin, Rours Vann, Sok Ko, Sum Phearun & Dolman, P. M. (2013) Experimental test of a conservation intervention for a highly threatened waterbird. J. Wildlife Mgmt. 77: 1610-1617. Download PDF

  • Wright, H. L., Collar, N. J., Lake, I. R. & Dolman, P. M. (2013) Amphibian concentrations in dessicating mud may determine the breeding season of the White-shouldered Ibis (Pseudibis davisoni). Auk 130: 774-783. Download PDF | Download SOM

  • Wright, D. J., Spurgin, L. G., Collar, N. J., Komdeur, J., Burke, T. & Richardson, D. S. (2014) The impact of translocations on neutral and functional genetic diversity within and among populations of the Seychelles warbler. Molec. Ecol. 23: 2165-2177. Download PDF

  • Bernardo, C. S. S., Olmos, F., Desbiez, A. L. J. & Collar, N. J. (2014) Reintroducing the Red-billed Curassow in Brazil: population viability analysis points to potential success. Natureza e Conservação 12: 53-58. Download PDF

  • Spurgin, L. G., Wright, D. J., van der Velde, M., Collar, N. J., Komdeur, J., Burke, T. A. & Richardson, D. S. (2014) Museum DNA reveals the demographic history of the endangered Seychelles warbler. Evol. Applications 7: 1134-1143. Download PDF

  • Bladon, A. J., Töpfer, T., Collar, N. J., Gedeon, K., Donald, P. F., Dellelegn, Y., Wondafrash, M., Denge, J., Dadacha, G., Adula, M. & Green, R. E. (2015) Notes on the behaviour, plumage and distribution of the White-tailed Swallow Hirundo megaensis. Bull. African Bird Club 22: 148-161. Download PDF

  • Collar, N. J. (2015) Natural history and conservation biology of the Tooth-billed Pigeon Didunculus strigirostris: a review. Pacific Conserv. Biol. 21: 186-199. [Email author for PDF]

  • Parashuram, D., Oppel, S., Fenton, C., James, G., Daley, J., Gray, G., Collar, N. J. & Dolman, P. M. (2015) The Forest Thrush Turdus lherminieri prefers tall forests with dense canopy. Bird Conserv. Internatn. 25: 503-513. Download PDF

  • Collar, N. J. (2015) Helmeted Hornbills and the ivory trade: the crisis that came out of nowhere. BirdingASIA 24: 12-17. Download PDF

  • Collar, N. (2015) Catch this falling star. World Birdwatch 37(4): 11-13. Download PDF

  • Bladon, A. J., Jones, S. E. I., Collar, N. J., Dellelegn, Y., Donald, P. F., Gedeon, K., Green, R. E., Spottiswoode, C. N., Töpfer, T. & Wondafrash, M. (2016) Further notes on the natural history of the Ethiopian Bush-crow Zavattariornis stresemanni. Bull. African Bird Club 23: 27-45. Download PDF

  • Bolton, N., van Oosterhout, C., Collar, N. J. & Bell, D. J. (2016) Population constraints on the Grenada Dove Leptotila wellsi: some preliminary findings and proposals from south-east Grenada. Bird Conserv. Internatn. 26: 205-213. Download PDF

  • Hille, S. M., Korner-Nievergelt, F., Bleeker, M. & Collar, N. J. (2016) Foraging behaviour at carcasses in an Asian vulture assemblage: towards a good restaurant guide. Bird Conserv. Internatn. 26: 263-272. Download PDF
   
  On bustard ecology and conservation
   
 
  • Collar, N. J. (1980) Bustard Group general report. ICBP Bull. 13: 129-134. Download PDF (1.3 Mb)

  • Collar, N. J. (1980) The world status of the Houbara: a preliminary review. Symposium papers on Houbara Bustard. Fordingbridge: Game Conservancy. Download PDF (2.8 Mb)

  • Collar, N. J. & Goriup, P. D. (1980) The conservation of the Great Bustard in Portugal: a working report. Unpublished. Download PDF (8.5 Mb)

  • Collar, N. J. & Goriup, P. D. (1981) Problems and progress in the captive breeding of Great Bustards in quasi-natural conditions. Avicult. Mag. 87: 131-140.

  • Collar, N. J. (1983) A history of the Houbara in the Canaries. Bustard Studies 1: 9-29. Download PDF (4.4 Mb)

  • Collar, N. J. (1983) The bustards and their conservation. Pp.244-257 in P. D. Goriup & H. Vardhan, eds. Bustards in decline. Jaipur: Tourism and Wildlife Society of India. Download PDF (2.6 Mb)

  • Inskipp, C. & Collar, N. J. (1984) The Bengal Florican: its conservation in Nepal. Oryx 18: 30-35. Download PDF (1.5 Mb)

  • Collar, N. J. (1985) The world status of the Great Bustard. Bustard Studies 2: 1-20. Download PDF (3.2 Mb)

  • Gray, T. N. E., Hong Chamnan, Ro Borey, Collar, N. J. & Dolman, P. M. (2007) Habitat preferences of a globally threatened bustard provide support for community-based conservation in Cambodia. Biol. Conserv. 138: 341-350 Download PDF

  • Gray, T. N. E., Collar, N. J., Davidson, P. J. A., Dolman, P. M., Evans, T. D., Fox, H. N., Hong Chamnan, Ro Borey, Seng Kim Hout & van Zalinge, R. N. (2009) Distribution, status and conservation of Bengal Florican Houbaropsis bengalensis in Cambodia. Bird Conserv. Internatn. 19: 1-14. Download PDF

  • Gray, T. N. E., Tarrant, M., Hong Chamnan, Collar, N. J. & Dolman, P. M. (2009) Sex-specific habitat use by a lekking bustard: conservation implications for the Critically Endangered Bengal Florican (Houbaropsis bengalensis) in an intensifying agroecosystem. Auk 126: 112-122. Download PDF

  • Gray, T. N. E., Ro Borey, Seng Kim Hout, Hong Chamnan, Collar, N. J. & Dolman, P. M. (2009) Generality of models that predict the distribution of species: conservation activity and the reduction of model transferability for a threatened bustard. Conserv. Biol. 23: 433-439. Download PDF

  • Collar, N. J. (2009) Bustard conservation strategies in Europe and beyond: a BirdLife perspective. Pp.13-22 in C. Attié & T. Micol, eds. Conservation des outardes en Europe. Rochefort, France: Ligue pour la Protection des Oiseaux.

  • Packman, C. E., Gray, T. N. E., Collar, N. J., Evans, T. D., van Zalinge, R. N., Son Virak, Lovett, A. A. & Dolman, P. M. (2013) Rapid loss of Cambodia’s grasslands. Conserv. Biol. 27: 245-247. Download PDF

  • Senyatso, K. J., Collar, N. J. & Dolman, P. M. (2013) Assessing range-wide conservation status change in an unmonitored widespread African bird species. Diversity & Distributions 19: 106-119.Download PDF| Download SOM

  • Koshkin, M. A., Collar, N. J. & Dolman, P. M. (2014) Do sheep affect distribution and habitat of Asian Houbara Chlamydotis macqueenii? J. Arid Env. 103: 53-62. Download PDF

  • Packman, C. E., Collar, N. J., Showler, D. A., Son Virak, Mahood, S. P., Handschuh, M., Evans, T. D., Hong Chamnan & Dolman, P. M. (2014) Rapid decline in the largest remaining population of Bengal Florican Houbaropsis bengalensis and recommendations for its conservation. Bird Conserv. Internatn. 24: 429-437. Download PDF

  • Collar, N. J., Patil, P. S. & Bhardwaj, G. S. (2015) What can save the Great Indian Bustard? BirdingASIA 23: 15-24. Download PDF

  • Dolman, P. M., Scotland, K. M., Collar, N. J. & Burnside, R. J. (2015) Ark or park: the need to predict relative effectiveness of ex situ and in situ conservation before attempting captive breeding. J. Appl. Ecol. 52: 841-850. Download PDF

  • Burnside, R. J., Collar, N. J., Koshkin, M. A. & Dolman, P. M. (2015) Avian powerline mortalities, including Asian Houbara Chlamydotis macqueenii, on the Central Asian flyway in Uzbekistan. Sandgrouse 37:161-168. Download PDF

  • Burnside, R. J., Collar, N. J., Scotland, K. M. & Dolman, P. M. (2016) Survival rates of captive-bred Asian Houbara Chlamydotis macqueenii in a hunted migratory population. Ibis 158: 353-361. Download PDF

  • Koshkin, M. A., Burnside, R. J., Collar, N. J., Guilherme, J. L., Showler, D. A. & Dolman, P. M. (2016) Effects of habitat and land-use on breeding-season density of male Asian Houbara Chlamydotis macqueenii. J. Orn. 157: 811-823. Download PDF

  • Koshkin, M., Burnside, R. J., Packman, C. E., Collar, N. J. & Dolman, P. M. (2016) Effects of habitat and livestock on nesting success of the declining Asian Houbara Chlamydotis macqueenii. Eur. J. Wildl. Res. 62: 447-459. Download PDF
   
  On parrots and parrot conservation
   
 
  • Collar, N. J. (1991) Threatened parrots of the Neotropics. AFA Watchbird 18(3): 43-48. Download PDF (2.9 Mb)

  • Wege, D. C. & Collar, N. J. (1991) The Blue-cheeked Amazon Amazona dufresniana: a review. Bird Conserv. Internatn. 1: 317-328. Download PDF (2.9 Mb)

  • Collar, N. J. & Juniper, A. T. (1992) Dimensions and causes of the parrot conservation crisis. Pp.1-24 in S. R. Beissinger & N. F. R. Snyder, eds. New World parrots in crisis: solutions from conservation biology. Washington, D.C.: Smithsonian Institution Press. Download PDF (4.1 Mb)

  • Collar, N. J. (1995) On the possible occurrence of Amazona dufresniana in Brazil (Psittaciformes: Psittacidae). Ararajuba 3: 70. Download PDF

  • Collar, N. J. (1996) Priorities for parrot conservation in the New World. Cotinga 5: 26-31. Download PDF (1.8 Mb)

  • Collar, N. J. & Pittman, A. J. (1996) Amazona kawalli is a valid name for a valid species. Bull. Brit. Orn. Club 116: 256-265. Download PDF (2 Mb)

  • Collar, N. J. (1998) Information and ignorance concerning the world’s parrots: an index for twenty-first century research and conservation. Pp.51-78 in Proc. IV International Parrot Convention (“Parrot conservation into the 21st century: uniting excellence in captivity and field”). Puerto de la Cruz, Tenerife: Loro Parque, S.A. [Reproduced in Papageienkunde 2: 201-235.] Download PDF (7.1 Mb)

  • Rasmussen, P. C. & Collar, N. J. (1999) On the hybrid status of Rothschild’s Parakeet Psittacula intermedia (Aves, Psittacidae). Bull. Nat. Hist. Mus. Lond. (Zool.) 65: 31-50. Download PDF (6.2 Mb)

  • Rasmussen, P. C. & Collar, N. J. (1999) Der Rothschilds Edelsittich ist ein Hybride! Papageien 12 (4/99): 139-141; (5/99): 171-173. Download PDF (2.5 Mb)

  • Rasmussen, P. C. & Collar, N. J. (1999) Little-known Oriental non-bird: Intermediate Parakeet Psittacula intermedia. Oriental Bird Club Bull. 29: 36-41. Download PDF (1.7 Mb)

  • Collar, N. J. (2000) Globally threatened parrots: criteria, characteristics and cures. Internatn. Zoo Yearbook 37: 21-35. Download PDF (3.5 Mb)
  • Collar, N. J. (2006) Two strange parrots in the genus Tanygnathus. BirdingASIA 6: 28-33. Download PDF (1.7 Mb)

  • Collar, N. J. (2006) Parrot reintroduction: towards a synthesis of best practice. Pp.82-107 in Proc. VI International Parrot Convention (“The pleasure of parrots”). Puerto de la Cruz, Tenerife: Loro Parque Fundación. Download PDF (8.5 Mb)

  • Collar, N. J. (2007) Taxonomic notes on some insular Loriculus hanging-parrots. Bull. Brit. Orn. Club 127: 97-107. Download PDF

  • White, T. H., Collar, N. J., Moorhouse, R., Sanz, V., Stolen, E. D. & Brightsmith, D. J. (2012) Psittacine reintroductions: common denominators of success. Biol. Conserv. 148: 106-115. Download PDF

  • White, T. H., Collar, N. J., Moorhouse, R., Sanz, V., Stolen, E. D. & Brightsmith, D. J. (2013) Psittacine reintroductions and IUCN guidelines—response to Seddon. Biol. Conserv. 164: 178-179. Download PDF

  • Collar, N. J., Lierz, M., Stanley Price, M. R. & Wirth, R. [Z.] (2015) Releases of confiscated and captive-bred parrots. Oryx 49: 202-203. Download PDF

  • Annorbah, N. N. D., Collar, N. J. & Marsden, S. J. (2016) Trade and habitat change virtually eliminate the Grey Parrot Psittacus erithacus from Ghana. Ibis 158: 82-91. Download PDF
   
  On other birds
   
 
  • Collar, N. J. (1978) Nesting of Black-shouldered Kites in Portugal. Brit. Birds 71: 398-412. Download PDF (2.9 Mb)

  • Collar, N. J. (1998) Wattled Cranes in Guinea Bissau. Bull. Brit. Orn. Club 118: 57-58.

  • Collar, N. J. (1998) Little-known Oriental bird: Luzon Water-redstart Rhyacornis bicolor. Oriental Bird Club Bull. 27: 26-28. Download PDF (2.7 Mb)

  • Collar, N. J. (2002) Insectivory and kleptoparasitism by Peregrine Falcons. Brit. Birds 95: 142. Download PDF

  • Hsu, W. & Collar, N. J. (2005) Black-chinned Fruit-dove Ptilinopus leclancheri and Scaly Thrush Zoothera dauma on Taiwan. Forktail 21: 193-196. Download PDF

  • Donegan, T. M., Collar, N. J., Ellery, T., Giles, O. A. R., Huertas, B., Olaciregui, C., Salaman, P., Swift, B. & Toro-M., J. L. (2010) Photographic record of Cedar Waxwing Bombycilla cedrorum from the Santa Marta Mountains, Colombia. Cotinga 32: 147-148. Download PDF

  • del Hoyo, J. & Collar, N. J. (2011) Acrobatic copulatory display in the Black-crowned Barwing Actinodura sodangorum. Forktail 27: 112-113. Download PDF

  • Collar, N. J. & Hall, P. (2011) Nocturnal roosting by Piapiacs Ptilostomus afer on a dockyard crane in Lagos, Nigeria. Malimbus 32: 90-91. Download PDF
   
  On bird people
   
 
  • Collar, N. J. (1995) Ted Parker: a personal memoir. Bird Conserv. Internatn. 5: 141-144. Download PDF

  • Collar, N. J. (2004) Pioneers of Asian ornithology: Robert Swinhoe. BirdingASIA 1: 49-53. Download PDF (1.4 Mb)

  • Collar, N. J. (2009) Pioneer of Asian ornithology: Gerd Heinrich. BirdingASIA 11: 33-40. Download PDF

  • Collar, N. J. & Prys-Jones, R. P. (2012) Pioneer of Asian ornithology: Allan Octavian Hume. BirdingASIA 17: 17-43. Download PDF

  • Collar, N. J. & Prys-Jones, R. P. (2013) Pioneer of Asian ornithology: Alfred Russel Wallace. BirdingASIA 20: 15-30. Download PDF

  • Collar, N. J. & Potts, G. R. (2014) John Ash, 1925–2014. Ibis 156: 907-910. Download PDF

  • Prys-Jones, R. P. & Collar, N. J. (2016) The May 1924 Meinertzhagen record of cranes flying over London. Bull. Brit. Orn. Club 136: 149-150. Download PDF
   
 
BOOKS
  Books on birds
   
 
  • Osborne, P., Collar, N. & Goriup, P. (1984) Bustards. Dubai: Dubai Wildlife Research Centre.

  • Collar, N. J. & Stuart, S. N. (1985) Threatened birds of Africa and related islands: the ICBP/IUCN Red Data Book. (Third edition, part 1). Cambridge, U.K.: International Council for Bird Preservation, and International Union for Conservation of Nature and Natural Resources.

  • Collar, N. J. & Andrew, P. (1988) Birds to watch: the ICBP world list of threatened birds. Cambridge, U.K.: International Council for Bird Preservation (Techn. Publ. 8).

  • Collar, N. J. & Stuart, S. N. (1988) Key forests for threatened birds in Africa. Cambridge, U.K.: International Council for Bird Preservation (Monogr. 3).

  • Bibby, C. J., Collar, N. J., Crosby, M. J., Heath, M. F., Imboden, Ch., Johnson, T. H., Long, A. J., Stattersfield, A. J. & Thirgood, S. J. (1992) Putting biodiversity on the map: priority areas for global conservation. Cambridge, U.K.: International Council for Bird Preservation.

  • Collar, N. J., Gonzaga, L. P., Krabbe, N., Madroño Nieto, A., Naranjo, L. G., Parker, T. A. & Wege, D. C. (1992) Threatened birds of the Americas: the ICBP/IUCN Red Data Book. (Third edition, part 2). Cambridge, U.K.: International Council for Bird Preservation.

  • Collar, N. J., Crosby, M. J. & Stattersfield, A. J. (1994) Birds to watch 2: the world list of threatened birds. Cambridge, U.K.: BirdLife International (BirdLife Conservation Series 4).

  • Collar, N. J., Mallari, N. A. D. & Tabaranza, B. R. (1999) Threatened birds of the Philippines. Manila: Bookmark, Inc., in conjunction with the Haribon Foundation.

  • Mari, C. & Collar, N. (2000) Pink Africa. London: Harvill Press.

  • Collar, N. J., editor-in-chief (2001) Threatened birds of Asia: the BirdLife International Red Data Book. (Third edition, part 3). Cambridge, U.K.: BirdLife International.

  • Silveira, L. F., Olmos, F., Bianchi, C. Simpson, J., Azeredo, R., McGowan, P. J. K. & Collar, N. J. (2005) Action plan for the conservation of the Red-billed Curassow Crax blumenbachii – a flagship species for the Brazilian Atlantic Forest. World Pheasant Association, Fordingbridge, UK, & BirdLife Brasil, São Paulo, Brazil.

  • Collar, N. J., Long, A. J., Robles Gil, P. & Rojo, J. (2007) Birds and people: bonds in a timeless journey. Mexico City: CEMEX.

  • Donald, P. F., Collar, N. J., Marsden, S. J. & Pain, D. J. (2010) Facing extinction: the world’s rarest birds and the race to save them. London: T. & A. D. Poyser

  • Collar, N. J., Dolman, P. M., Scotland, K. M. & Swash, A. R. H. (2014) The houbara in Uzbekistan. Abu Dhabi: Emirates Bird Breeding Center for Conservation.

  • del Hoyo, J. & Collar, N. J. (2014) The HBW–BirdLife International illustrated checklist of the birds of the world, 1: non-passerines. Barcelona: Lynx Edicions.

  • del Hoyo, J. & Collar, N. J. (2016) The HBW–BirdLife International illustrated checklist of the birds of the world, 2: passerines. Barcelona: Lynx Edicions..
   
  Volumes edited
   
 
  • Collar, N. J., Fisher, C. T. & Feare, C. J., eds. (2003) Why museums matter: avian archives in an age of extinction. Bull. Brit. Orn. Club 123A: 1-360.

  • Azafzaf, H., Sande, E., Evans, S. W., Smart, M. & Collar, N. J. (2005) International Action Plan for Houbara Bustard Chlamydotis undulata undulata. Nairobi: BirdLife International African Partnership.

  • Brooks, T. M., Collar, N. J., Green, R. E., Marsden, S. J. & Pain, D. J., eds. (2008) The science of bird conservation: in memory of Colin Bibby. Bird Conserv. Internatn. 18 (suppl.1).
   
  Volume translated
   
 
  • Gewalt, W. (1959) Die Grosstrappe. Wittenberg-Lutherstadt: Neue Brehm-Bücherei. [Translation, 1976; typescript in EGI Library, Oxford, and BirdLife Library, Cambridge]
   
  Contributions to books on birds or bird conservation
   
 
  • Cramp, S. & Simmons, K. E. L., eds. (1980) The birds of the western Palearctic, 2. Oxford: Oxford University Press. (Initialled entries on galliformes and raptors)

  • Cramp, S. & Simmons, K. E. L., eds. (1983) The birds of the western Palearctic, 3. Oxford: Oxford University Press. (Accredited editor on title page)

  • Collar, N. J. (1985) Bustard. Pp.74-75 in B. Campbell & E. Lack, eds. A dictionary of birds. Calton, U.K.: T. & A. D. Poyser.

  • Collar, N. J. (1985) Bustards. Pp.152-155 in C. M. Perrins & A. L. A. Middleton, eds. The encyclopaedia of birds. London: George Allen & Unwin.

  • Collar, N. J., Goriup, P. D. & Osborne, P. E. (1986) Bustard family. Pp.148-179 in E. K. Urban, C. H. Fry & S. Keith, eds. (1986) The birds of Africa, 2. London: Academic Press.

  • Collar, N. J. (1996) Family Otididae (bustards). Pp.240-273 in J. del Hoyo, A. Elliott & J. Sargatal, eds. Handbook of the birds of the world, 3. Barcelona: Lynx Edicions.

  • Collar, N. J. (1997) Family Psittacidae (parrots). Pp.280-477 in J. del Hoyo, A. Elliott & J. Sargatal, eds. Handbook of the birds of the world, 4. Barcelona: Lynx Edicions.

  • Collar, N. J. (2000) An introduction to the parrots [in German]. Lexicon of parrots. Bretten, Germany: Arndt-Verlag.

  • Collar, N. J. (2001) Endangered birds. Pp.395-406 in Encyclopedia of biodiversity, 2. New York: Academic Press. Download PDF (4.1 Mb)

  • Collar, N. J. (2001) Family Trogonidae (trogons). Pp.80-127 in J. del Hoyo, A. Elliott & J. Sargatal, eds. Handbook of the birds of the world, 6. Barcelona: Lynx Edicions.

  • Rasmussen, P. C. & Collar, N. J. (2002) Family Bucconidae (puffbirds). Pp.102-138 in J. del Hoyo, A. Elliott & J. Sargatal, eds. Handbook of the birds of the world, 7. Barcelona: Lynx Edicions.

  • Collar, N. J. (2005) Family Turdidae (thrushes and chats). Pp. 514-807 in J. del Hoyo, A. Elliott & D. Christie, eds. Handbook of the birds of the world, 10. Barcelona: Lynx Edicions.

  • Collar, N. J. & Robson, C. R. (in press) Family Timaliidae (babblers). In J. del Hoyo, A. Elliott & D. Christie, eds. Handbook of the birds of the world, 12. Barcelona: Lynx Edicions.

  • Collar, N. J. & Robson, C. (2007) Family Timaliidae (babblers). Pp.70-291 in J. del Hoyo, A. Elliott & D. A. Christie, eds. Handbook of the birds of the world, 12. Barcelona: Lynx Edicions.

  • Butchart, S. H. M., Collar, N. J., Stattersfield, A. J. & Bennun, L. A. (2010) Conservation of the world’s birds: the view from 2010. Pp.13-68 [“Foreword” = guest essay] in J. del Hoyo, A. Elliott & D. A. Christie, eds. Handbook of the birds of the world, 15. Barcelona: Lynx Edicions.

  • Collar, N. J. & Newton, I. (2010) Family Fringillidae (finches) introduction. Pp.440-511 in J. del Hoyo, A. Elliott & D. A. Christie, eds. Handbook of the birds of the world, 15. Barcelona: Lynx Edicions.

  • Collar, N. J. (2013) Species accounts for Threskiornis bernieri, Plegadis falcinellus, Lophotibis cristata and Copsychus albospecularis. Pp.224-232 and 692-695 in R. J. Safford & A. F. A. Hawkins, eds. The birds of Africa, 8: the Malagasy region. London: Christopher Helm.