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You searched for: Subject "birds of prey" Remove constraint Subject: "birds of prey"
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1. Aposematism and mimicry in birds

Author:
Esme Hedley; Tim Caro
Source:
Ibis 2022 v.164 no.2 pp. 606-617
ISSN:
0019-1019
Subject:
birds of prey,   etc   ; Aves; advertising; color; mimicry (behavior); wills;     Show all 6 Subjects
Abstract:
... We review the literature on warning coloration in birds starting from Alfred Russel Wallace's premise that aposematism may advertise difficulty in subduing prey rather than simply unpalatability. Across diverse taxa, there is a good deal of anecdotal information to suggest that signals, usually involving conspicuous coloration, are associated not only with distastefulness but with informing predat ...
DOI:
10.1111/ibi.13025

2. Movement patterns of the White‐tailed Sea Eagle (Haliaeetus albicilla): post‐fledging behaviour, natal dispersal onset and the role of the natal environment

Author:
Marc Engler; Oliver Krone
Source:
Ibis 2022 v.164 no.1 pp. 188-201
ISSN:
0019-1019
Subject:
birds of prey,   etc   ; Haliaeetus albicilla; juveniles; life history; nests; telemetry; Germany;     Show all 7 Subjects
Abstract:
... Exploratory movements and natal dispersal form essential processes during early life history stages of raptors, but identifying the factors shaping individual movement decisions is challenging. Global positioning system (GPS) telemetry thereby provides a promising technique to study movement patterns on adequate spatio‐temporal scales. We analysed data of juvenile White‐tailed Sea Eagles Haliaeetu ...
DOI:
10.1111/ibi.12967

3. Sentinel behavior in captive meerkats (Suricata suricatta)

Author:
Florian D. Huels; Angela S. Stoeger
Source:
Zoo biology 2022 v.41 no.1 pp. 10-19
ISSN:
0733-3188
Subject:
birds of prey,   etc   ; Suricata suricatta; captive animals; posture; predation; songbirds; zoos;     Show all 7 Subjects
Abstract:
... The social and cooperative behavior of meerkats (Suricata suricatta), specifically their sentinel behavior, has been intensively studied in free‐ranging populations. This study focuses on whether guarding in captive meerkats exhibits a pattern similar to that described for wild groups. Sentinel behavior in captivity has been somewhat neglected because predation is usually not a critical factor. No ...
DOI:
10.1002/zoo.21644

4. To Catch a (Marsh) Predator: Modified Trapping Methods for Breeding and Wintering Northern Harriers (Circus hudsonius)

Author:
Shannon M. Skalos; Michael L. Casazza; Matthew J. Falcon; William Thein; Joshua M. Hull
Source:
Journal of raptor research 2022 v.56 no.2 pp. 190-200
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Circus; adults; females; nests; water birds; winter; California;     Show all 8 Subjects
Abstract:
... Although there are a variety of methods available for trapping raptors, some species, such as Northern Harriers (Circus hudsonius), are not easily captured with standard methods. We tested several existing trapping methods and modified two of them based on Northern Harrier ecology and behavior across seasons in a study population in California. No previously successful methods described in the lit ...
DOI:
10.3356/JRR-21-79

5. First Satellite Telemetry Study of Movement Behavior of Juvenile Golden Eagles from Mexico

Author:
J. Lizardo Cruz-Romo; Martin Sánchez-Vilchis; Víctor Sánchez-Cordero; Robert K. Murphy; Ismael Cruz-Molina; Juan J. Vargas-Velasco; Manuel Valdés-Alarcón; Brian A. Millsap
Source:
Journal of raptor research 2022 v.56 no.1 pp. 28-36
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Aquila chrysaetos; eagles; females; juveniles; satellites; telemetry; travel; Mexico;     Show all 9 Subjects
Abstract:
... The southern limit of the Golden Eagle's (Aquila chrysaetos) breeding range in North America is Mexico, where the eagle is the national symbol yet designated as a threatened, high priority species for conservation action. Movement information needed for conserving Mexico's Golden Eagles is sparse; knowledge of dispersal from natal areas is essential to understand the eagle's ecology and help provi ...
DOI:
10.3356/JRR-20-101

6. Landscape Configuration Influences Species Occupancy over Multiple Spatial Scales: A Case Study on Tawny Owl

Author:
Jakob Wildraut; Marco Basile
Source:
Journal of raptor research 2022 v.56 no.1 pp. 55-64
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Strix; case studies; coniferous forests; habitat fragmentation; habitats; landscapes;     Show all 7 Subjects
Abstract:
... Landscape configuration can influence the distribution of species across multiple spatial scales. The primary factors related to this process are connectivity, the size and position of habitat patches, and edge effects. These factors together determine the overall fragmentation of a landscape, which in turn influences species occurrence. Although some species show a negative response to fragmentat ...
DOI:
10.3356/JRR-20-133

7. Weather and food availability additively affect reproductive output in an expanding raptor population

Author:
Melanie Nägeli; Patrick Scherler; Stephanie Witczak; Benedetta Catitti; Adrian Aebischer; Valentijn van Bergen; Urs Kormann; Martin U. Grüebler
Source:
Oecologia 2022 v.198 no.1 pp. 125-138
ISSN:
0029-8549
Subject:
birds of prey,   etc   ; Milvus milvus; climate; food availability; land use; life history; rain; reproductive performance; spring;     Show all 9 Subjects
Abstract:
... The joint effects of interacting environmental factors on key demographic parameters can exacerbate or mitigate the separate factors’ effects on population dynamics. Given ongoing changes in climate and land use, assessing interactions between weather and food availability on reproductive performance is crucial to understand and forecast population dynamics. By conducting a feeding experiment in 4 ...
DOI:
10.1007/s00442-021-05076-6

8. Defining Spatial Conservation Priorities for the Andean Condor (Vultur gryphus)

Author:
Robert B. Wallace; Ariel Reinaga; Natalia Piland; Renzo Piana; F. Hernán Vargas; Rosa Elena Zegarra; Sergio Alvarado; Sebastián Kohn; Sergio A. Lambertucci; Pablo Alarcón; Diego Méndez; Fausto Sáenz-Jiménez; Francisco Ciri; José Álvarez; Fernando Angulo; Vanesa Astore; Jannet Cisneros; Jessica Gálvez-Durand; Rosa Vento; Celeste Cóndor; Víctor Escobar; Martín Funes; Alejandro Kusch; Adrián Naveda-Rodríguez; Claudia Silva; Galo Zapata-Ríos; Carolina Gargiulo; Sandra Gordillo; Javier Heredia; Rubén Morales; Alexander More; David Oehler; Oscar Ospina-Herrera; Andrés Ortega; José Antonio Otero; Carlos Silva; Guillermo Wiemeyer; Lorena Zurita
Source:
Journal of raptor research 2022 v.56 no.1 pp. 1-16
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Vultur gryphus; expert opinion; wildlife; Andes region; Argentina; Bolivia; Chile; Colombia; Ecuador; Peru; Venezuela;     Show all 12 Subjects
Abstract:
... The Andean Condor (Vultur gryphus) is a culturally iconic wildlife symbol for the South American Andes, but is naturally found at very low population densities, and is increasingly threatened. Using the Range Wide Priority Setting methodology, we (a group of 38 Andean Condor experts) updated the Andean Condor historical range (3,230,061 km²), systematized 9998 Andean Condor distribution points acr ...
DOI:
10.3356/JRR-20-59

9. New Nesting Records and Breeding Ecology Observations of Rufous-Legged Owls in the Mediterranean Temperate Forest of Central Chile

Author:
Martín A. H. Escobar; M. Angélica Vukasovic; Jorge A. Tomasevic; Sandra V. Uribe; Ana M. Venegas; Francisco Santander; Cristián F. Estades
Source:
Journal of raptor research 2022 v.56 no.1 pp. 106-110
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Fagus; Nothofagus; Pinus radiata; Strix; clutch size; diet; eggs; forestry; landscapes; temperate forests; Chile;     Show all 12 Subjects
Abstract:
... The Rufous-legged Owl (Strix rufipes) is the southernmost Strix owl species and its breeding ecology remains little known. We report new observations on the species' breeding ecology, including clutch size, egg size, duration of the incubation and nestling periods, and nestling diet. We conducted our observations on nests found during the summers of 1999 through 2004 in a forestry landscape of cen ...
DOI:
10.3356/JRR-20-116

10. Rotenone Use and Subsequent Prey Loss Lowers Osprey Fledging Rates Via Brood Reduction

Author:
Charles J. Henny; James L. Kaiser
Source:
Journal of raptor research 2022 v.56 no.1 pp. 37-54
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Ameiurus nebulosus; Haliaeetus leucocephalus; Oncorhynchus mykiss; Oregon; Pandion haliaetus; fish; kleptoparasitism; nests; rotenone; spring; yearlings;     Show all 12 Subjects
Abstract:
... Fisheries managers used the fish toxicant rotenone to eradicate an undesirable brown bullhead (Ameiurus nebulosus) population and all other fish species at Hyatt Reservoir, Oregon, on 12 October 1989. This 4-yr study (1988–1990, 1992) compared effects of that rotenone project on Ospreys (Pandion haliaetus) nesting at Hyatt Reservoir and nearby Howard Prairie Reservoir (untreated reference)—the lat ...
DOI:
10.3356/JRR-21-14

11. Feathers as an integrated measure of organohalogen contamination, its dietary sources and corticosterone in nestlings of a terrestrial bird of prey, the northern Goshawk (Accipiter gentilis)

Author:
Sina T. Randulff; Naeem A. Abbasi; Igor Eulaers; Torgeir Nygård; Adrian Covaci; Marcel Eens; Govindan Malarvannan; Gilles Lepoint; Mari E. Løseth; Veerle L.B. Jaspers
Source:
Science of the total environment 2022 v.828 pp. 154064
ISSN:
0048-9697
Subject:
birds of prey,   etc   ; Accipiter gentilis; adrenal glands; biphenyl; carbon; corticosterone; ecophysiology; ecotoxicology; environment; environmental monitoring; hexabromocyclododecane; oils; polychlorinated biphenyls;     Show all 13 Subjects
Abstract:
... In this study, we evaluated the suitability of body feathers, preen oil and plasma for estimation of organohalogen compound (OHC) exposure in northern goshawk Accipiter gentilis nestlings (n = 37; 14 nests). In addition, body feathers received further examination concerning their potential to provide an integrated assessment of (1) OHC exposure, (2) its dietary sources (carbon sources and trophic ...
DOI:
10.1016/j.scitotenv.2022.154064

12. Bird electrocution on power lines: Spatial gaps and identification of driving factors at global scales

Author:
Francisco Guil; Juan Manuel Pérez-García
Source:
Journal of environmental management 2022 v.301 pp. 113890
ISSN:
0301-4797
Subject:
birds of prey,   etc   ; electricity; endangered species; energy; environmental management; experimental design; mortality; risk; sustainable development; Africa; Europe; North America; Pacific Ocean Islands; South America;     Show all 14 Subjects
Abstract:
... Universal energy access is one of the targets of the Sustainable Development Goals (SDGs), and thus the deployment of electricity grids is expected to expand globally in the coming decades. However, the installation of power lines is not biodiversity-friendly. In particular, electrocution on power pylons is a major cause of bird mortality worldwide, including for some severely endangered species. ...
DOI:
10.1016/j.jenvman.2021.113890

13. Resurveys Reveal Potential Population Increases of the Himalayan Griffon in Central West Nepal

Author:
Christopher J. W. McClure; Krishna Prasad Bhusal; Dikpal Krishna Karmacharya; Munir Z. Virani
Source:
Journal of raptor research 2022 v.56 no.1 pp. 125-130
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; progeny; Nepal;     Show all 3 Subjects
Abstract:
... The Himalayan Griffon (Gyps himalayensis) is listed as near threatened and its populations are poorly monitored. During late May and early June of 2013, 2014, and 2016, we resurveyed transects that were originally sampled 2002–2006. These transects were within the Annapurna region of Nepal. From 2010 through 2020, we also monitored a breeding colony of Himalayan Griffons within the Arghakhanchi Di ...
DOI:
10.3356/JRR-21-36

14. A pilot study about assisted reproduction in harpy eagles (Harpia harpyja) in the course of species conservation including collection, storage, and analysis of semen

Author:
Dominik Fischer; Marcos José de Oliveira; Katrin Baumgartner; Hermann Will; Stacy Wu; Paloma Bosso; Pedro Henrique Ferreira Teles; Zalmir Silvino Cubas; Michael Lierz; Lorenzo von Fersen
Source:
Theriogenology 2022 v.181 pp. 190-201
ISSN:
0093-691X
Subject:
birds of prey,   etc   ; Harpia harpyja; artificial insemination; eagles; females; gene pool; genetic variation; habitat destruction; males; pH; progeny; refrigerators; semen; sperm concentration; sperm motility; spermatozoa; viability;     Show all 17 Subjects
Abstract:
... Currently, 52% of all raptor species demonstrate a decreasing population tendency, and the American harpy eagle (Harpia harpyja) has been categorized as “near threatened” by the IUCN. Habitat loss, persecution, and subsequent reduction of genetic diversity are regarded as major threats to the world's strongest eagle. Captive breeding and reintroduction into protected habitats are approaches of spe ...
DOI:
10.1016/j.theriogenology.2022.01.012

15. Off-Grid Downhole Video Recording System to Monitor Burrowing Owls

Author:
Lois Balin; Richard Heilbrun; Jason Cox; Kelly Norrid
Source:
Journal of raptor research 2021 v.55 no.4 pp. 565-573
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Athene cunicularia; burrows; labor; nests; Texas;     Show all 6 Subjects
Abstract:
... Studying species that nest underground, such as the Burrowing Owl (Athene cunicularia) is challenging. Ecological and behavioral information about Burrowing Owls is often limited to activities occurring aboveground or to insights gained from live viewing using downhole cameras and burrow scopes with limited recording capacity. Although automated monitoring systems may enhance underground observati ...
DOI:
10.3356/JRR-20-61

16. Mercury speciation in Scottish raptors reveals high proportions of inorganic mercury in Scottish golden eagles (Aquila chrysaetos): Potential occurrence of mercury selenide nanoparticles

Author:
Shaun T. Lancaster; Gabriela Peniche; Ali Alzahrani; Magdalena Blanz; Jason Newton; Mark A. Taggart; Warren T. Corns; Eva M. Krupp; Jörg Feldmann
Source:
Science of the total environment 2022 v.829 pp. 154557
ISSN:
0048-9697
Subject:
birds of prey,   etc   ; Accipiter; Aquila chrysaetos; Buteo buteo; Circus cyaneus; Strix; Tyto alba; bioimaging; carbon; diet; environment; isotopes; liver; mass spectrometry; mercury; methylmercury compounds; necropsy; nitrogen; selenides; selenium; transmission electron microscopy; Scotland;     Show all 22 Subjects
Abstract:
... Knowledge of the uptake and fate of mercury (Hg) compounds in biota is important in understanding the global cycling of Hg and its transfer pathways through food chains. In this study, we analysed total mercury (T-Hg) and methylmercury (MeHg) concentrations in 117 livers of Scottish birds of prey that were found across Scotland and submitted for post-mortem examination through the Raptor Health Sc ...
DOI:
10.1016/j.scitotenv.2022.154557

17. Is the Tiny Hawk (Accipiter superciliosus) Really a Specialized Predator on Hummingbirds? Using Citizen Science Data to Elucidate Dietary Preferences of a Little-Known Neotropical Raptor

Author:
Alex J. Berryman; Guy M. Kirwan
Source:
Journal of raptor research 2021 v.55 no.2 pp. 276-280
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Accipiter; Chiroptera; Neotropics; Trochilidae; citizen science; diet; hummingbirds;     Show all 8 Subjects
Abstract:
... We used photo-documented citizen science data held in publicly accessible databases to better elucidate the diet of one of the smallest Neotropical Accipitridae, the Tiny Hawk (Accipiter superciliosus). Previous data are exclusively anecdotal, but a suggestion that this species is to some extent a specialized predator on hummingbirds (Trochilidae) is widely reported in the literature, despite bein ...
DOI:
10.3356/0892-1016-55.2.276

18. The Harris Hawk (Parabuteo unicinctus) in Urban Areas of Argentina: Arrival in Mar Del Plata City and Green Area Use in Buenos Aires City

Author:
Lucas M. Leveau
Source:
Animals 2021 v.11 no.4 pp. -
ISSN:
2076-2615
Subject:
birds of prey,   etc   ; Parabuteo unicinctus; habitat preferences; species diversity; urbanization; Argentina;     Show all 6 Subjects
Abstract:
... Urbanization has a negative impact on raptor species diversity and abundance. However, some species can adapt to urban areas, and the process of city colonization by raptors has been documented scarcely in the Northern Hemisphere. Information about city colonization by raptors in the Southern Hemisphere is null, and studies about habitat use by raptors are scarce. The objectives of this study were ...
DOI:
10.3390/ani11041023

19. Challenges Adapting a Backpack Harness for Use on Gray Hawks (Buteo plagiatus)

Author:
Michael T. Stewart; Brian A. Millsap
Source:
Journal of raptor research 2022 v.56 no.1 pp. 111-115
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Buteo; harness; hawks; research projects; solar collectors; Texas;     Show all 7 Subjects
Abstract:
... Raptor biologists have successfully used backpack-type harnesses to attach transmitters to a wide range of raptor species for research. As part of a graduate research project with Gray Hawks (Buteo plagiatus) in south Texas, we attached harnesses to 58 individuals and experienced problems with seven birds removing the harnesses and with all females covering the solar panels of the OrniTrack-10 GPS ...
DOI:
10.3356/JRR-21-31

20. Observations on the Breeding Behavior of the Blakiston's Fish Owl (Bubo blakistoni) On Hokkaidō, Japan

Author:
Sumio Yamamoto
Source:
Journal of raptor research 2022 v.56 no.2 pp. 245-252
ISSN:
0892-1016
Subject:
birds of prey,   etc   ; Bubo blakistoni; Japan; endangered species; females; forests; males;     Show all 7 Subjects
Abstract:
... Blakiston's Fish Owl (also known as Blakiston's Eagle-Owl; Bubo blakistoni) is an endangered species that inhabits northeast Asia. Blakiston's Fish Owls were rare (approximately 70 individuals) on Hokkaidō, Japan, at the start of my study, but rigorous protection and intervention programs have led to more than a doubling of the population (approximately 165 individuals) since 1970. Despite its elu ...
DOI:
10.3356/JRR-21-10