Supplemental Material for Explorative Innovators and Flexible Use of Social Information in Common Ravens (Corvus corax) and Carrion Crows (Corvus corone)

Explorative innovators and flexible use of social information in common ravens (Corvus corax) and carrion crows (Corvus corone).

Journal of Comparative Psychology ◽

10.1037/com0000039 ◽

2016 ◽

Vol 130 (4) ◽

pp. 328-340 ◽

Cited By ~ 4

Author(s):

Rachael Miller ◽

Christine Schwab ◽

Thomas Bugnyar

Keyword(s):

Social Information ◽

Corvus Corax ◽

Corvus Corone

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Nest occupation and prey grabbing by saker falcon (Falco cherrug) on power lines in the province of Vojvodina (Serbia)

Archives of Biological Sciences ◽

10.2298/abs0802271p ◽

2008 ◽

Vol 60 (2) ◽

pp. 271-277 ◽

Cited By ~ 5

Author(s):

S. Puzovic

Keyword(s):

Common Vole ◽

Early Spring ◽

Power Lines ◽

Falco Tinnunculus ◽

Corvus Corax ◽

Hooded Crow ◽

Circus Aeruginosus ◽

Corvus Corone ◽

Saker Falcon ◽

Falco Cherrug

Research on nest occupation and prey grabbing by saker falcon (Falco cherrug) on power lines in Vojvodina (Serbia) was done in the period from 1986 to 2004. During three specially analyzed periods, saker falcon took the nests of raven (Corvus corax) in 91% of a total of 22 cases of nest occupation, and those of hooded crow (Corvus corone cornix) in only 9%. Saker falcon regularly grabs prey from different birds that occasionally or constantly spend time around power lines [Kestrel (Falco tinnunculus), hobby (Falco subbuteo), hooded crow (Corvus corone cornix), jack-daw (Corvus monedula), marsh harrier (Circus aeruginosus), hen harrier (Circus cyaneus), buzzard (Buteo buteo), and raven (Corvus corax)]. One year a studied pair of saker falcons on a power line in Donji Srem, Serbia grabbed prey from five different species of birds. Out of a total of 40 cases of prey grabbing in the period from January to December, as much 70% of the grabbed prey was taken from kestrel (Falco tinnunculus). During the winter and early spring, prey was grabbed predominantly by males; after May, prey was sometimes grabbed by females as well. Most of the grabbed prey was common vole (Microtus arvalis).

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Familiarity with the experimenter influences the performance of Common ravens (Corvus corax) and Carrion crows (Corvus corone corone) in cognitive tasks

Behavioural Processes ◽

10.1016/j.beproc.2013.11.013 ◽

2014 ◽

Vol 103 ◽

pp. 129-137 ◽

Cited By ~ 6

Author(s):

Lara Cibulski ◽

Claudia A.F. Wascher ◽

Brigitte M. Weiß ◽

Kurt Kotrschal

Keyword(s):

Cognitive Tasks ◽

Corvus Corax ◽

Corvus Corone

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Behavioral Responses of Captive Corvids to the Presence of Visitors

Animal Behavior and Cognition ◽

10.26451/abc.08.04.03.2021 ◽

2021 ◽

Vol 8 (4) ◽

pp. 481-492

Author(s):

Claudia A.F. Wascher ◽

Niklas Baur ◽

Marietta Hengl ◽

Carina Köck ◽

Teresa Pegger ◽

...

Keyword(s):

Behavioral Responses ◽

Behavioral Changes ◽

Corvus Corax ◽

Welfare Impacts ◽

Close Proximity ◽

Corvus Corone ◽

Control Situations ◽

Affiliative Behaviors

Behavioral responses of captive animals to the presence of visitors in zoos and wildlife parks can be interpreted as signs of negative (disturbance), neutral or positive (enrichment) welfare. In the present study, we investigated behavioral responses of captive common ravens, Corvus corax and crows, Corvus corone, to the presence of visitors in general and to the proximity or distance of visitors to the aviary respectively. Duration of affiliative behaviors, feeding and stress-related behaviors did not change when visitors were present compared to control situations without visitors being present. Both corvid species showed less head up behavior when visitors were in sight compared to the control condition. In contrast, preening of crows significantly increased when visitors were within two meters of the aviary compared to the control condition. The same relationship was found in regard to increase in vocalization for common ravens, but not for crows. Our results indicate that corvids, housed in a wildlife park for several years, still show behavioral responses to the presence of human visitors in close proximity to their enclosure. Overall, we did not find clear indications for reduced welfare due to visitor presence, such as increased locomotion or stress-related behaviors. We therefore conclude that the described behavioral changes are not indicative of any negative welfare impacts of visitor presence.

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Hostility and Perceptions of Support in Ambiguous Social Interactions

Journal of Individual Differences ◽

10.1027/1614-0001.27.2.108 ◽

2006 ◽

Vol 27 (2) ◽

pp. 108-115 ◽

Cited By ~ 5

Author(s):

Ana-Maria Vranceanu ◽

Linda C. Gallo ◽

Laura M. Bogart

Keyword(s):

Social Support ◽

Social Networks ◽

Information Processing ◽

Social Interactions ◽

Social Information Processing ◽

Perceived Social Support ◽

Social Information ◽

Inverse Association ◽

Processing Bias ◽

Information Processing Bias

The present study investigated whether a social information processing bias contributes to the inverse association between trait hostility and perceived social support. A sample of 104 undergraduates (50 men) completed a measure of hostility and rated videotaped interactions in which a speaker disclosed a problem while a listener reacted ambiguously. Results showed that hostile persons rated listeners as less friendly and socially supportive across six conversations, although the nature of the hostility effect varied by sex, target rated, and manner in which support was assessed. Hostility and target interactively impacted ratings of support and affiliation only for men. At least in part, a social information processing bias could contribute to hostile persons' perceptions of their social networks.

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