Ignorant hooded crows follow knowledgeable roost-mates to food: support for the information centre hypothesis

Proceedings. Biological Sciences
G A SonerudO Bråthen

Abstract

Communal roosting in birds may function to enhance foraging efficiency as explained by the information centre hypothesis, which predicts that successful foragers return from the roost to the rewarding food patch and that birds ignorant of this food follow knowledgeable roost-mates. We tested these predictions by exposing 34 radio-tagged, free-ranging, flock-living hooded crows (Corvus corone cornix) to a novel experimental set-up mimicking a superfluous food patch with maximum temporal and spatial unpredictability Each replicate lasted two days and was located on a new site. Data were collected during ten replicates over three years. First, a crow was more likely to visit the experimental food patch on the second day when it had been there on the first day. Second, when a crow had not been at this food patch on the first day, it was more likely to visit it on the second day if it had roosted together with a crow that had been there on the first day, but only if this knowledgeable roost-mate returned to the food patch on the second day. Our results support the information centre hypothesis and suggest that communal roosting might function to enhance foraging efficiency in hooded crows.

References

Dec 16, 1998·Animal Behaviour·I C W Hardy, S A Field

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Citations

Dec 14, 2007·Biology Letters·Simon M ReaderSusanne Rebers
Mar 28, 2008·Biology Letters·Andrew L JacksonDavid C Houston
Jun 21, 2003·Proceedings. Biological Sciences·Emma SernlandNoél M A Holmgren
Mar 27, 2010·Behavioural Processes·Stéphan G Reebs
Aug 15, 2014·PloS One·Manaswini SarangiT N C Vidya
Aug 12, 2005·Behavioral Sciences & the Law·Michael P Arena, Bruce A Arrigo
May 8, 2019·Animals : an Open Access Journal From MDPI·Doris PreiningerMarkus Boeckle
May 31, 2019·Learning & Behavior·Ira G FederspielN J Emery

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