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Observations of a Large Roost of Common Ravens
The Condor, 1981Communal winter roosting is common in many corvids. Winter roosts of Common Ravens (Corvus corax) have been found in trees (Cushing 1941, Hutson 1945, Hurrell 1956, Harlow et al. 1975) and abandoned buildings (Temple 1974). Coombes (1948) described coastal cliffs as roost sites, but his observations were made in the fall, possibly on vagrants.
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Movements of Juvenile Common Ravens in an Arid Landscape
The Journal of Wildlife Management, 2009ABSTRACT Movement patterns of juvenile birds are poorly understood, yet critically important ecological phenomena, especially for species with a prolonged juvenile period. We evaluated postfledging movements of juvenile common ravens ( Corvus corax ) in a western Mojave ...
WILLIAM C. WEBB +2 more
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Ad Libitum Water Source for a Common Raven
The Wilson Journal of Ornithology, 2009Abstract We report a Common Raven (Corvus corax) that learned to turn on a water faucet in a campground at Death Valley National Park, Inyo County, California, USA, and drink from it. Ad libitum availability of water has important implications for survival and reproductive success of desert birds.
Lawrence M. Hanks +3 more
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Using Morphometrics To Determine the Sex of Common Ravens
Northwestern Naturalist, 2008Abstract We tried using morphometrics to determine sex for a population of Common Ravens (Corvus corax) in northwestern Wyoming. We attempted to correlate 13 external measurements to sex using discriminant function analyses. Sex was verified with a DNA test that identified females with 2 PCR-amplified gene copies (1 each from the W and Z chromosomes ...
Bryan Bedrosian +2 more
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Influence of competitors on caching behaviour in the common raven,Corvus corax
Animal Behaviour, 1998Both territorial breeding common ravens and nonbreeding vagrants scatter-hoard carcass meat extensively. We show experimentally with four captive nonbreeders in a large semi-natural enclosure that common ravens alter their caching behaviour in the presence of conspecifics.
, Heinrich, , Pepper
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Gaze following in common ravens, Corvus corax: ontogeny and habituation
Animal Behaviour, 2007Co-orientation with others by using their gaze direction is considered to be adaptive for detecting food or predators or monitoring social interactions. Like the great apes, common ravens are capable of following human experimenters' gaze direction not only into distant space but also behind visual barriers.
Schlögl, Hans Christian +2 more
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Common ravens raid arctic fox food caches
Journal of Ethology, 2006Cache recovery is critical for evolution of hoarding behaviour, because the energy invested in caching may be lost if consumers other than the hoarders benefit from the cached food. By raiding food caches, animals may exploit the caching habits of others, that should respond by actively defending their caches.
Vincent Careau +3 more
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Conflict, Cooperation, and Cognition in the Common Raven
2011Abstract In this overview of the modern study of the behavior of the Common raven, Corvus corax, I integrate recent experiments and observations of both field and captive-held birds. A primary contention and original focus concerned the apparently enigmatic behavior of juveniles and non-breeders recruiting others to share food bonanzas.
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