Results 141 to 150 of about 7,257 (176)

Cultural transmission of vocalizations in ravens, Corvus corax

Animal Behaviour, 2002
Abstract As ravens have pronounced learning capabilities, especially in the vocal domain, cultural transmission might be a relevant factor affecting the composition of their vocal repertoires. We investigated how important cultural transmission is in establishing a raven's vocal repertoire and whether there are different pathways of transmission.
Peter Enggist-Dueblin, Ueli Pfister
openaire   +1 more source

Influence of competitors on caching behaviour in the common raven,Corvus corax

Animal Behaviour, 1998
Both 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
openaire   +2 more sources

Leading a conspecific away from food in ravens ( Corvus corax )?

Animal Cognition, 2004
Active misleading of conspecifics has been described as a social strategy mainly for primates. Here we report a raven leading a competitor away from food in a social foraging task. Four individuals had to search and compete for hidden food at color-marked clusters of artificial food caches.
Bugnyar, Thomas, Kotrschal, Kurt
openaire   +3 more sources

Verwandtenerkennung bei Kolkraben (Corvus corax)

2013
Living in social groups holds many advantages but also disadvantages. To be able to cope with the complexities in such groups, it’s helpful to recognize individuals by their unique characteristics. The aim of this study was to investigate whether Common Ravens (Corvus corax) are able to differentiate between calls of unknown and known conspecifics ...
openaire   +1 more source

Scrounging Tactics in Free‐Ranging Ravens, Corvus corax

Ethology, 2002
AbstractSocial 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 attention. We presently examine whether ravens, as opportunistic scavengers, adjust their foraging tactics according to the potential costs involved ...
Bugnyar, Thomas, Kotrschal, Kurt
openaire   +2 more sources

Cuervo grande – Corvus corax Linnaeus, 1758

2023
Aves - Orden Passeriformes - Familia Corvidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/.
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Gaze following in common ravens, Corvus corax: ontogeny and habituation

Animal Behaviour, 2007
Co-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, Kotrschal, Kurt, Bugnyar, Thomas   +2 more
openaire   +2 more sources

When, what, and whom to watch? Quantifying attention in ravens (Corvus corax) and jackdaws (Corvus monedula).

Journal of Comparative Psychology, 2007
Complex social life requires monitoring of conspecifics. The amount and focus of attention toward others has been suggested to depend on the social relationships between individuals. Yet there are surprisingly few experiments that have tested these assumptions.
Christelle Scheid, Friederike Range, Thomas Bugnyar   +2 more
openaire   +3 more sources

Common Raven (Corvus corax)

The Birds of North America Online, 1999
William I. Boarman, Bernd Heinrich
openaire   +1 more source

Corvus corax 渡鴉 @iN

2022
Kwok, Alan, Tai, Ada
openaire   +1 more source