Results 71 to 80 of about 1,210,242 (209)

Long-term Population Survey of the Eastern Imperial Eagle in the Thracian Eco-region (Bulgaria and Turkey)

open access: yesПернатые хищники и их охрана, 2018
The Thrace geographical region comprises territories of three states and covers an area of about 70,000 km2. At the end of the 19th century, the Eastern Imperial Eagle (Aquila heliaca) was widespread throughout the region, occupying a variety of habitats.
Dimitar A. Demerdzhiev   +5 more
doaj  

Novelty Induces Behavioural And Glucocorticoid Responses In A Songbird Artificially Selected For Divergent Personalities [PDF]

open access: yes, 2017
Stress physiology is thought to contribute to individual differences in behaviour. In part this reflects the fact that canonical personality measures consist of responses to challenges, including novel objects and environments.
Baugh, Alexander T.   +5 more
core   +2 more sources

Spring migration of Ruffs Philomachus pugnax in Fryslân: estimates of staging duration using resighting data [PDF]

open access: yes, 2010
Seasonal bird migration involves long flights, but most time is actually spent at intermediate staging areas. The duration of stay at these sites can be evaluated with mark–recapture methods that employ day-to-day local encounters of individually marked ...
Hooijmeijer, Jos C.E.W.,   +3 more
core   +1 more source

Phylogenetic Reclassification of Metarhizium granulomatis and Metarhizium viride Species Complex

open access: yesPathogens
Metarhizium (M.) granulomatis and M. viride have previously been described as pathogens causing hyalohyphomycosis in various species of captive chameleons and bearded dragons (Pogona vitticeps).
Johanna Würf, Volker Schmidt
doaj   +1 more source

II. BIRDS.

open access: yesProceedings of the Zoological Society of London, 1887
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +2 more sources

Water bathing alters the speed-accuracy trade-off of escape flights in European starlings [PDF]

open access: yes, 2009
Birds of most species regularly bathe in water, but the function of this behaviour is unknown. We tested the hypothesis that water bathing is important in feather maintenance, and hence should enhance flight performance. We manipulated European starlings'
Asher, L   +3 more
core   +2 more sources

Structure, ontogeny and evolution of the patellar tendon in emus (Dromaius novaehollandiae) and other palaeognath birds [PDF]

open access: yes, 2014
The patella (kneecap) exhibits multiple evolutionary origins in birds, mammals, and lizards, and is thought to increase the mechanical advantage of the knee extensor muscles.
Alexander   +84 more
core   +3 more sources

Enigmacursor mollyborthwickae, a neornithischian dinosaur from the Upper Jurassic Morrison Formation of the western USA

open access: yesRoyal Society Open Science
Although their remains have been known since the 1870s, the small, bipedal ornithischian dinosaurs from the Upper Jurassic Morrison Formation of the western USA remain poorly known. The historic type specimens are incomplete and poorly preserved and have
Susannah C. R. Maidment, Paul M. Barrett
doaj   +1 more source

The First Anti Poison Dog Unit in Bulgaria to Secure the Eagle and Vulture Populations Persistence

open access: yesПернатые хищники и их охрана, 2018
Poisons in ecological systems pose threat to a number of mammal and bird species at global scale (Zugasti, 2014, Brochet et al., 2017). This is recognized as the most severe threat to all vulture species worldwide (Botha et al., 2017) and at the same ...
Dobromir D. Dobrev, Nikolai G. Terziev
doaj  

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