Results 31 to 40 of about 406 (143)
The Canadian field-naturalist, 1957 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire +2 more sources
Predator‐prey feedback in a gyrfalcon‐ptarmigan system? [PDF]
Ecology and Evolution, 2017 Abstract Specialist predators with oscillating dynamics are often strongly affected by the population dynamics of their prey, yet they are not always the cause of prey cycling. Only those that exert strong (delayed) regulation of their prey can be.
Barraquand, Frédéric +1 more
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Behavioural responses of a gamebird to human encounters across the hunting season
Wildlife Biology, Volume 2026, Issue 2, March 2026.We examined the behavioural adaptation of rock ptarmigan Lagopus muta in response to human encounters across the hunting season. We conducted disturbance experiments in two different parts of the species' range, in subarctic (Iceland) and in alpine (Italy) habitats.
Farina Sooth +2 more
wiley +1 more source
A Helicopter Survey for Cliff-Nesting Raptors Along the Dalton Highway in Northern Alaska, 2010
BirdsWe conducted a helicopter survey in 2010 for cliff-nesting raptors along the Dalton Highway in northern Alaska. The study area extended from the Yukon River northward ~395 km through the Brooks Range to the Arctic Plain.
Erica H. Craig +2 more
doaj +1 more source
The Gray Gyrfalcon in Wisconsin
The Auk, 1905 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Avian influenza overview September–November 2025
EFSA Journal, Volume 23, Issue 12, December 2025.Abstract Between 6 September and 28 November 2025, 2896 highly pathogenic avian influenza (HPAI) A(H5) virus detections were reported in domestic (442) and wild (2454) birds in 29 countries in Europe. The magnitude and geographical extent of these detections were unprecedented for this time of the year, particularly in wild birds.
European Food Safety Authority +15 more
wiley +1 more source
Journal of Zoology, Volume 327, Issue 3, Page 236-247, November 2025.We used high‐precision diet estimates from nest cameras to estimate amino acid‐specific trophic discrimination factors (TDFs) for gyrfalcon nestlings and compared these against TDFs for other taxa from the literature. TDFs for trophic amino acids in gyrfalcon were lower than values that have typically been used to estimate trophic position.
A. Bautista +5 more
wiley +1 more source
Ibis, Volume 167, Issue 4, Page 1053-1064, October 2025.GPS tracking has enabled significant advances in the study of animal movements such as migration and habitat use. However, GPS devices can affect the behaviour of tagged individuals, especially for flying animals such as birds, and may ultimately impair their reproduction and/or survival.
Lise Viollat +5 more
wiley +1 more source
Avian influenza overview June–September 2025
EFSA Journal, Volume 23, Issue 10, October 2025.Abstract Between 7 June and 5 September 2025, 183 highly pathogenic avian influenza (HPAI) A(H5) virus detections were reported in domestic (27) and wild (156) birds across 15 countries in Europe. Although HPAI A(H5N1) virus detections were predominant in western and southwestern Europe, they also occurred on the northernmost coast of Norway. More than
European Food Safety Authority +16 more
wiley +1 more source
International Journal of Osteoarchaeology, Volume 35, Issue 5, Page 284-294, September/October 2025.ABSTRACT Agents of taphonomy can bias skeletal parts and the frequency of bones in archaeological sites. An important factor to consider is the possible effect of bone density‐mediated attrition on archaeornithological assemblages. We scanned willow ptarmigan (Lagopus lagopus) specimens using a Lunar iDXA and an enCcore small animal body add‐on to ...
Frank J. Dirrigl Jr. +1 more
wiley +1 more source