Winter foraging at carcasses by three sympatric corvids, with emphasis on recruitment by the raven, Corvus corax
@article{Heinrich2004WinterFA, title={Winter foraging at carcasses by three sympatric corvids, with emphasis on recruitment by the raven, Corvus corax}, author={Bernd Heinrich}, journal={Behavioral Ecology and Sociobiology}, year={2004}, volume={23}, pages={141-156} }
SummaryLarge animal carcasses provide a highly clumped rich source of food for ravens that should be worth defending, yet in the forests of Maine and Vermont ravens commonly feed in groups. Ravens discover baits flying singly or in pairs, but after a bait is discovered they usually arrive in groups. In contrast, the maximum number of blue jays and crows eventually attending a bait is close to those discovering it. Unlike in crows and jays, two patterns of bait use are seen in ravens: baits are…
153 Citations
Rich Pickings Near Large Communal Roosts Favor ‘Gang’ Foraging by Juvenile Common Ravens, Corvus corax
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This work adapts a general model of juvenile common raven foraging behavior to show formally how the trade off between search efficiency and social opportunity can account for the existence of the alternative social foraging tactics that have been observed in this species.
Common ravens, Corvus corax, preferentially associate with grey wolves, Canis lupus, as a foraging strategy in winter
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It is shown that ravens preferentially associate with wolves in both the presence and absence of food, resulting in the discovery of carcasses and suppression of ravens' innate fear of novel food sources.
Social scavenging by wintering striated caracaras (Phalcoboenus australis) in the Falkland Islands
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The eastern wolf (Canis lycaon) is important to the Algonquin Provincial Park ecosystem through its top-down influences on the food web. While previous research in Yellowstone National Park has shown…
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Social foraging allows individuals to scrounge, i.e. to exploit the food others have made available. The conditions promoting scrounging as an alternative foraging tactic have yet received limited…
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Decision time modulates social foraging success in wild common ravens, Corvus corax
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Investigating which factors underline kleptoparasitism avoidance is a promising scenario to test specific predictions derived from these hypotheses and concludes that individuals benefit from applying cognition to such decision‐making, independently of age class.
Common Myna Roosts Are Not Recruitment Centres
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The recruitment centre hypothesis did not hold in the study population of mynas, and flock sizes were smallest at the feeding site and larger in the evening than in the morning, but did not coincide with predator activity, information transfer unrelated to food may possibly give rise to the evening aggregations.
Winter Ecology and Spring Dispersal of Common Ravens in Wyoming
- Environmental ScienceWestern North American Naturalist
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Abstract.
Numbers of Common Ravens (Corvus corax) have increased in western North America, and these high abundances are the source of problems throughout the species' range. Little is known about…
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