Nigel Collar

10.2k citations

179 papers · 5.8k indexed · 3 hit papers · h-index 28

Impact in

Ecological Modeling top 0.2%
- Species Distribution and Climate Change
Nature and Landscape Conservation top 0.5%
- Ecology and Vegetation Dynamics Studies

Papers in ⓘ

Ecological Modeling 50
- Species Distribution and Climate Change 50
Nature and Landscape Conservation 70
- Ecology and Vegetation Dynamics Studies 40
- Wildlife Conservation and Criminology Analyses 18

Co-authors: M. J. Crosby (5 shared papers)Simon N. Stuart (5 shared papers)Alison J. Stattersfield (3 shared papers)Joseph A. Tobias (6 shared papers)Georgina M. Mace (3 shared papers)Craig Hilton‐Taylor (2 shared papers)H. Reşi̇t Akçakaya (2 shared papers)E.J. Milner‐Gulland (1 shared paper)
Journals: Bird Conservation International (23 papers)Ibis (14 papers)Oryx (12 papers)Biological Conservation (7 papers)The Auk (4 papers)
Partner nations: United Kingdom United States Kenya

In The Last Decade

Nigel Collar

170 papers receiving 4.7k citations

Hit Papers

align trajectories log scale

Quantitative criteria for species delimitation 2010 · 635 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2010 Ibis
2008 Conservation Biology
1996 Colonial Waterbirds

Peers

Countries citing papers authored by Nigel Collar

Since Specialization

Citations

This map shows the geographic impact of Nigel Collar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Nigel Collar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Nigel Collar more than expected).

Fields of papers citing papers by Nigel Collar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Nigel Collar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Nigel Collar. The network helps show where Nigel Collar may publish in the future.

Co-authors

The 25 scholars most cited alongside Nigel Collar, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Nigel Collar Line = papers co-authored together Nigel Collar links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 179 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Quantification of Extinction Risk: IUCN's System for Classifying Threatened Species Conservation Biology ·Georgina M. Mace, Nigel Collar, Kevin J. Gaston, Craig Hilton‐Taylor, H. Reşi̇t Akçakaya, Nigel Leader‐Williams, E.J. Milner‐Gulland, Simon N. Stuart Hit paper breakdown →	2008	983
2	Quantitative criteria for species delimitation Ibis ·Joseph A. Tobias, Nathalie Seddon, Claire N. Spottiswoode, John D. Pilgrim, Lincoln Fishpool, Nigel Collar Hit paper breakdown →	2010	635
3	Birds to Watch 2: The World List of Threatened Birds Colonial Waterbirds ·Nigel Collar, M. J. Crosby, Alison J. Stattersfield Hit paper breakdown →	1996	561
4	Threatened Birds of Asia; The BirdLife International Red Data Book Medical Entomology and Zoology ·Nigel Collar, А. В. Андреев, Simba Chan, M. J. Crosby, Subramanya Shravan Kumar, Joseph A. Tobias	2001	455
5	Threatened Birds of the Americas: The Icbp/Iucn Red Data Book Nigel Collar	1992	269
6	Deforestation Predicts the Number of Threatened Birds in Insular Southeast Asia Conservation Biology ·Thomas M. Brooks, Stuart L. Pimm, Nigel Collar	1997	194
7	Threatened Birds of Africa and Related Islands Nigel Collar, Simon N. Stuart, Norman Arlott	1987	172
8	Threatened birds of the Americas Nigel Collar, Luíz Pedreira Gonzaga, Niels Krabbe, Ana Nieto, Luis Germán Naranjo, Theodore A. Parker, David C. Wege	1992	165
9	Value of the IUCN Red List Trends in Ecology & Evolution ·John F. Lamoreux, H. Reşi̇t Akçakaya, Leon Bennun, Nigel Collar, Luigi Boitani, David Brackett, Amie Bräutigam, Thomas M. Brooks, Gustavo A. B. da Fonseca, Russell A. Mittermeier, Anthony B. Rylands, Ulf Gärdenfors, Craig Hilton‐Taylor, Georgina M. Mace, Bruce A. Stein, Simon N. Stuart	2003	130
10	How many bird extinctions have we prevented? Oryx ·Stuart H. M. Butchart, Alison J. Stattersfield, Nigel Collar	2006	127
11	Threatened birds of Asia Nigel Collar, А. В. Андреев, Simba Chan, M. J. Crosby, Subramanya Shravan Kumar, Joseph A. Tobias	2001	117
12	Key forests for threatened birds in Africa Nigel Collar, Simon N. Stuart	1988	91
13	Psittacine reintroductions: Common denominators of success Biological Conservation ·Thomas H. White, Nigel Collar, Ron J. Moorhouse, Virginia Sanz, Eric D. Stolen, Donald J. Brightsmith	2012	81
14	The future for Sundaic lowland forest birds: long-term effects of commercial logging and fragmentation Biodiversity Heritage Library (Smithsonian Institution) ·Frank R. Lambert, Nigel Collar	2002	79
15	Extinction by assumption; or, the Romeo Error on Cebu Oryx ·Nigel Collar	1998	72
16	Spatio-temporal dynamics of consumer demand driving the Asian Songbird Crisis Biological Conservation ·Harry Marshall, Nigel Collar, Alexander Charles Lees, Andrew Moss, Pramana Yuda, Stuart J. Marsden	2019	57
17	The reasons for Red Data Books Oryx ·Nigel Collar	1996	50
18	The impact of translocations on neutral and functional genetic diversity within and among populations of the Seychelles warbler Molecular Ecology ·David Wright, Lewis G. Spurgin, Nigel Collar, Jan Komdeur, Terry Burke, David S. Richardson	2014	48
19	Ark or park: the need to predict relative effectiveness of ex situ and in situ conservation before attempting captive breeding Journal of Applied Ecology ·Paul M. Dolman, Nigel Collar, Keith M. Scotland, Robert J. Burnside	2015	43
20	Museum DNA reveals the demographic history of the endangered Seychelles warbler Evolutionary Applications ·Lewis G. Spurgin, David Wright, Marco van der Velde, Nigel Collar, Jan Komdeur, Terry Burke, David S. Richardson	2014	41

About Nigel Collar

Nigel Collar is a scholar working on Ecological Modeling, Nature and Landscape Conservation, Ecology, Developmental Biology and Ecology, Evolution, Behavior and Systematics, having authored 179 papers that have together received 5.8k indexed citations. Recurring topics across this work include Wildlife Ecology and Conservation (94 papers), Avian ecology and behavior (76 papers), Species Distribution and Climate Change (50 papers), Ecology and Vegetation Dynamics Studies (40 papers), Wildlife Conservation and Criminology Analyses (18 papers), Genetic diversity and population structure (16 papers), Animal Behavior and Reproduction (13 papers) and Plant and animal studies (13 papers). The work is most often cited by research in Ecological Modeling (1.8k citations), Nature and Landscape Conservation (2.3k citations), Ecology (3.7k citations), Developmental Biology (302 citations) and Ecology, Evolution, Behavior and Systematics (1.4k citations). Nigel Collar has collaborated with scholars based in United Kingdom, United States and Kenya. Frequent co-authors include M. J. Crosby, Simon N. Stuart, Alison J. Stattersfield, Joseph A. Tobias, Georgina M. Mace, Craig Hilton‐Taylor, H. Reşi̇t Akçakaya, E.J. Milner‐Gulland, Nigel Leader‐Williams and Kevin J. Gaston. Their work appears in journals such as Bird Conservation International, Ibis, Oryx, Biological Conservation and The Auk.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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