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Article
Philip W. Atkinson, Auteur ; Ngone Diop, Auteur ; Robert A. Robinson, Auteur ; Res Altwegg, Auteur ; Arjun Amar, Auteur ; Ian Barber, Auteur ; André J. Botha, Auteur ; Graeme Buchanan, Auteur ; Achilles Byaruhanga, Auteur ; Adams Chaskda, Auteur ; Imad Cherkaoui, Auteur ; Norbert J. Cordeiro, Auteur ; Nonie Coulthard, Auteur ; Colin Cross, Auteur ; Laura Dami, Auteur ; Neil Deacon, Auteur ; Pierre Defos du Rau, Auteur ; Sergey Dereliev, Auteur ; Clemence Deschamps, Auteur ; Tim Dodman, Auteur ; Paul Gacheru, Auteur ; Wenceslas Gatarabirwa, Auteur ; Richard Gregory, Auteur ; Danny Heptinstall, Auteur ; Samuel T. Ivande, Auteur ; Nancy Job, Auteur ; Gwawr Jones, Auteur ; Alan T. K. Lee, Auteur ; Angus Middleton, Auteur ; Victor Mkongewa, Auteur ; P. Kariuki Ndang’ang’a, Auteur ; Darcy Ogada, Auteur ; Chris Orsman, Auteur ; Ulf Ottosson, Auteur ; Julia Pierini, Auteur ; Bruno G. Portier, Auteur ; Hugo Rainey, Auteur ; Ernst Retief, Auteur ; Marc van Roomen, Auteur ; Peter Ryan, Auteur ; Sarah Scott, Auteur ; Talatu Tende, Auteur ; Robert Thomson, Auteur ; Mpho Williart, Auteur ; Paul Woodcock, Auteur ; Simon R. Wotton, Auteur ; Paul Robinson, AuteurBiodiversity monitoring is essential to inform the state of wildlife populations, and the impacts of environmental change, conservation intervention, and sustainable development policies and actions. We review the current state of bird monitorin[...]
Article
Merlyn Nomusa Nkomo, Auteur ; Megan Murgatroyd, Auteur ; Samantha Ralston-Paton, Auteur ; Arjun Amar, AuteurThe global energy transition necessitates a rapid increase in infrastructure in developing countries, including for wind energy facilities (WEFs). Concerns arise regarding the negative impacts of WEFs on biodiversity, especially on birds of prey[...]
Article
Connor T. Panter, Auteur ; Arjun Amar, AuteurDiet differences between the sexes and ages have often been recorded for bird species. Many raptor species show extreme sexual size dimorphism, with females often considerably larger than the males and these differences may be reflected in their[...]
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Arjun Amar, Auteur ; Daniël Cloete, AuteurHuman populations in Africa are growing at a faster rate than in any other region; this growth will exert increasing pressures on the continent’s wildlife resources and declines in wildlife are already being observed. Species occupying higher tr[...]
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Sonja Krüger, Auteur ; Arjun Amar, AuteurCapsule: Fledglings progressively increase their home range size and ranging behaviour as they age.Aims: To examine the home range size and ranging behaviour of Bearded Vulture fledglings during the post-fledging dependence period and determine [...]
Article
Jessleena Suri, Auteur ; Petra Sumasgutner, Auteur ; Éléonore Hellard, Auteur ; Ann Koeslag, Auteur ; Arjun Amar, AuteurAs the global trend towards urbanization continues, the need to understand its impact on wildlife grows. Species may have different levels of tolerance to urban disturbance; some even appear to thrive in urban areas and use human-subsidized reso[...]
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Petra Sumasgutner, Auteur ; Gareth J. Tate, Auteur ; Ann Koeslag, Auteur ; Arjun Amar, AuteurCapsule: Urban Black Sparrowhawk males hunt mostly within 2.27 km of their nest during the breeding season (‘home range’ of 16.15 km2) and increased the distance slightly to 2.43 km outside of the breeding season (18.56 km2). We found high indiv[...]
Article
Lainie Zarones, Auteur ; Adrienne Sussman, Auteur ; John M. Morton, Auteur ; Sheldon Plentovich, Auteur ; Sarah Faegre, Auteur ; Celestino Aguon, Auteur ; Arjun Amar, Auteur ; Renee Robinette Ha, AuteurThe Mariana Crow Corvus kubaryi is a Critically Endangered species found only on the island of Rota, Northern Mariana Islands. It was extirpated from the neighbouring island of Guam by the introduced brown tree snake Boiga irregularis and the Ro[...]
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Ralf HE Mullers, Auteur ; Arjun Amar, AuteurShoebills (Balaeniceps rex) are endemic to large, well-vegetated wetlands in central-eastern Africa. Populations are believed to be declining throughout their range and knowledge about their ecology, behaviour and distribution is vital for their[...]
Article
Jakob Katzenberger, Auteur ; Gareth Tate, Auteur ; Ann Koeslag, Auteur ; Arjun Amar, AuteurUnderstanding the effects climate change may have on animal populations relies on establishing which environmental conditions shape their behaviour and subsequent reproductive output, fitness or survival. South Africa has seen significant warmin[...]
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Ralf H. E. Mullers, Auteur ; Arjun Amar, AuteurShoebills (Balaeniceps rex) breed in central-eastern Africa with a world population of only 5,000-8,000 individuals. To provide protection to this threatened species, conservationists need a better understanding about Shoebill foraging and breed[...]
Article
Christine F. Madden, Auteur ; Beatriz Arroyo, Auteur ; Arjun Amar, AuteurCorvids are often viewed as efficient predators capable of limiting prey species populations. Despite this widely held belief, a comprehensive review quantifying the effect of corvids on the demography of prey species is lacking. We examine the [...]
Article
Christine F. Madden, Auteur ; Beatriz Arroyo, Auteur ; Arjun Amar, AuteurCorvids are often viewed as efficient predators capable of limiting prey species populations. Despite this widely held belief, a comprehensive review quantifying the effect of corvids on the demography of prey species is lacking. We examine the [...]
Article
Beatriz Arroyo, Auteur ; Fiona Leckie, Auteur ; Arjun Amar, Auteur ; Aly McCluskie, Auteur ; Steve Redpath, AuteurCapsule Breeding female Hen Harriers hunted mostly within 1km from the nest and males mostly within 2 km.Aims To quantify temporal and spatial variation in home-range sizes and hunting distances of breeding male and female Hen Harriers.Methods W[...]
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Arjun Amar, Auteur ; Murray Grant, Auteur ; Graeme Buchanan, Auteur ; Innes Sim, Auteur ; Jared Wilson, Auteur ; James W. Pearce-Higgins, Auteur ; Steve Redpath, AuteurCapsule Declines of upland waders were associated with habitat cover, forest edge exposure, grouse moor management intensity and crow abundance. Aims To explore whether changes in the abundance of five wader species in the uplands correlate with[...]
Article
Jane Carpenter, Auteur ; Jennifer Smart, Auteur ; Arjun Amar, Auteur ; Andrew Gosler, Auteur ; Shelley Hinsley, Auteur ; Elisabeth Charman, AuteurCapsule Marsh Tits were strongly associated with both the amount and species diversity of woodland understorey; Blue Tits were associated with large trees and deadwood. Aims To gather quantitative information on the habitat requirements of Marsh[...]
Article
Jane Carpenter, Auteur ; Jennifer Smart, Auteur ; Arjun Amar, Auteur ; Andrew Gosler, Auteur ; Shelley Hinsley, Auteur ; Elisabeth Charman, AuteurCapsule Marsh Tits were strongly associated with both the amount and species diversity of woodland understorey; Blue Tits were associated with large trees and deadwood. Aims To gather quantitative information on the habitat requirements of Marsh[...]
Article
Alex J. G. Lewis, Auteur ; Arjun Amar, Auteur ; Laura Daniells, Auteur ; Elisabeth C. Charman, Auteur ; Phil Grice, Auteur ; Ken Smith, AuteurDans Bird Study (56 2009)Capsule Birds selected younger woodland patches with fewer conifers and higher soil moisture content; within these patches, they selected areas with higher vegetation cover at 2-4 m, and less bracken. Aims For an apparently stable population, to[...]
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Arjun Amar, Auteur ; Ann Koeslag, Auteur ; Gerard Malan, Auteur ; Mark Brown, Auteur ; Erin Wreford, AuteurThe morph ratio distribution in polymorphic species often varies clinally, with a gradual change in morph ratios across the distributional range of the species. In polymorphic bird populations, clinal variation is rarely quantified. We describe [...]
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Karen Mustin, Auteur ; Arjun Amar, Auteur ; Stephen M. Redpath, AuteurUncovering the mechanisms involved in the decline of long-distance migrants remains one of the most pressing issues in European conservation. Since the 1980s, the British breeding population of Garden Warbler Sylvia borin has declined by more th[...]
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Alex J. G. Lewis, Auteur ; Arjun Amar, Auteur ; Elisabeth C. Charman, Auteur ; Finn R. P. Stewart, AuteurNumbers of the British Willow Tit Poecile montanus kleinschmidti have decreased dramatically in recent decades. This paper outlines the three main hypotheses for the decline - increased competition, increased predation and changes in habitat ava[...]
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Alex J. G. Lewis, Auteur ; Arjun Amar, Auteur ; Daniel Cordi-Piec, Auteur ; Richard M. Thewlis, AuteurDans Ibis (149 NOV 2007)The British Willow Tit Poecile montanus kleinschmidti underwent a decline of 85% between 1970 and 2003. The cause of this decline is unknown. However, several hypotheses have been put forward to account for it: competition from other tit species[...]
Article
Richard J. Evans, Auteur ; Jeremy D. Wilson, Auteur ; Arjun Amar, Auteur ; Andrew Douse, Auteur ; Alison MacLennan, Auteur ; Norman Ratcliffe, Auteur ; D. Philip Whitfield, AuteurWhite-tailed Eagles Haliaeetus albicilla became extinct in Britain in 1918 following prolonged persecution. Intensive conservation efforts since the 1970s have included the re-introduction of the species to Britain through two phases of release [...]
Article
Shelley A. Hinsley, Auteur ; Jane E. Carpenter, Auteur ; Richard K. Broughton, Auteur ; Paul E. Bellamy, Auteur ; Peter Rothery, Auteur ; Arjun Amar, Auteur ; Chris M. Hewson, Auteur ; Andrew G. Gosler, AuteurDans Ibis (149 NOV 2007)The Marsh Tit Poecile palustris is a small, hole-nesting woodland passerine whose national population in the UK has declined by more than 50% in the last 25 years. To investigate possible causes for the species long-term decline, we examined hab[...]
Article
Beatriz Arroyo, Auteur ; Arjun Amar, Auteur ; Fiona Leckie, Auteur ; Graeme M. Buchanan, Auteur ; Jeremy D. Wilson, Auteur ; Stephen Redpath, AuteurWe examine habitat use by hunting hen harriers Circus cyaneus at three study sites in Scotland to evaluate whether foraging patterns differ between sexes, sites, and stages of the breeding period. We modelled time spent hunting in focal plots as[...]
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Jennifer Smart, Auteur ; Arjun Amar, Auteur ; Innes M. W. Sim, Auteur ; Brian Etheridge, Auteur ; Duncan Cameron, Auteur ; George Christie, Auteur ; Jeremy D. Wilson, AuteurThe re-introduction of extirpated species is a valuable conservation tool. Red kites Milvus milvus are declining over much of their European range and have been re-introduced to England and Scotland, following their extinction due to widespread [...]
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Arjun Amar, Auteur ; Beatriz Arroyo, Auteur ; Eric Meek, Auteur ; Steve Redpath, Auteur ; Helen Riley, Auteur
Article
Arjun Amar, Auteur ; Ian R. Court, Auteur ; Martin Davison, Auteur ; Steve Downing, Auteur ; Trevor Grimshaw, Auteur ; Terry Pickford, Auteur ; David Raw, AuteurWildlife crime can be difficult to quantify, and its true impact on populations can be underestimated if rates are under-recorded. The illegal killing of birds of prey is an important form of wildlife crime, which in the UK, is often associated [...]
Article
Gareth Tate, Auteur ; Petra Sumasgutner, Auteur ; Ann Koeslag, Auteur ; Arjun Amar, AuteurHow multiple morphs are maintained within populations of colour polymorphic bird species remains a challenging question in evolutionary ecology. In some systems, differential productivity or survival between morphs are thought to play a role. He[...]
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Arjun Amar, Auteur ; Jacob A. Esselstyn, AuteurDiagnosing the causes of population declines of highly endangered species is vital to ensure that appropriate conservation measures are undertaken. Although experiments can provide critical information on potential causes, these can be time cons[...]
