Nigel Collar's research while affiliated with BirdLife International and other places

Publications (977)

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Bustards comprise a highly threatened family of birds and, being relatively fast, heavy fliers with very limited frontal visual fields, are particularly susceptible to mortality at powerlines. These infrastructures can also displace them from immediately adjacent habitat and act as barriers, fragmenting their ranges. With geographically ever wider...
Article
African Houbara Chlamydotis undulata is threatened in North Africa by unsustainable hunting and massive overuse of captive-bred birds to replace wild losses. A small population on the Canary Islands is protected from these threats, but the archipelago is economically dependent on tourism which has led to extensive land-use change, particularly clos...
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Remnant forests on the small Wallacean island of Sangihe north of Sulawesi hold the entire ranges of more Critically Endangered (CR) bird species than any other comparable area on earth. We develop habitat association models for three of these CR species to identify critical habitat features as well as areas where habitat falls slightly short of su...
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The Eurasian Bustard Alliance, in partnership with the Wildlife Science and Conservation Center of Mongolia, and Institute of Biology of the Mongolian Academy of Sciences, conceived and convened an international meeting, Advancing the Conservation of the Great Bustard in Asia, to which delegates from Iran eastwards were invited to provide historica...
Book
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17 geographically comprehensive articles evaluating the status of the Western Great Bustard Otis tarda tarda in Central Asia, and presenting recommendations for conservation actions
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A challenge with species that have disappeared from most of their range is to identify the correlates of local persistence. With species decimated by trade, site‐specific trapping risk is hard to capture by remotely accessed predictors. The recently split yellow‐crested cockatoo Cacatua sulphurea and citron‐crested cockatoo C. citrinocristata have...
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The Black-winged Myna (Acridotheres melanopterus) is an Endangered passerine endemic to the islands of Java and Bali, Indonesia. Illegal trapping to supply the cage-bird trade has led to its near-total extinction, with the global population estimated to number fewer than 100 individuals. We estimated the current range and population size of the spe...
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Knowledge of breeding success and its limiting factors is crucial in assessing species’ conservation needs. As cavity-nesters, parrots are particularly influenced by the availability of suitable cavities and low breeding output, whether due to natural processes or trapping. On the island of Sumba, Indonesia, the Critically Endangered Citron-crested...
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While urbanisation remains a major threat to biodiversity, urban areas can sometimes play an important role in protecting threatened species, especially exploited taxa such as parrots. The Hispaniolan Parakeet Psittacara chloropterus has been extirpated across much of Hispaniola, including from most protected areas, yet Santo Domingo (capital city...
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Translocation of captive-bred individuals to reinforce wild populations may be an important conservation approach for some species, but can be detrimental when employed to boost exploited wild populations, particularly where repeated long-term reinforcement aims to compensate for repeated unregulated offtake. We review evidence that captive breedin...
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Two world lists and OSME treat Arabian (or Yemen) Accentor Prunella fagani as a species; two other world lists and a recent Western Palearctic handbook treat it as a subspecies of Radde’s Accentor P. ocularis. On the basis of museum specimens and photographs we find that fagani can be distinguished from ocularis with certainty only by its paler, gr...