Object caching in corvids: incidence and significance

Behavioural Processes
Ivo F JacobsAlex Kacelnik

Abstract

Food caching is a paramount model for studying relations between cognition, brain organisation and ecology in corvids. In contrast, behaviour towards inedible objects is poorly examined and understood. We review the literature on object caching in corvids and other birds, and describe an exploratory study on object caching in ravens, New Caledonian crows and jackdaws. The captive adult birds were presented with an identical set of novel objects adjacent to food. All three species cached objects, which shows the behaviour not to be restricted to juveniles, food cachers, tool-users or individuals deprived of cacheable food. The pattern of object interaction and caching did not mirror the incidence of food caching: the intensely food caching ravens indeed showed highest object caching incidence, but the rarely food caching jackdaws cached objects to similar extent as the moderate food caching New Caledonian crows. Ravens and jackdaws preferred objects with greater sphericity, but New Caledonian crows preferred stick-like objects (similar to tools). We suggest that the observed object caching might have been expressions of exploration or play, and deserves being studied in its own right because of its potential significance for too...Continue Reading

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Citations

Aug 16, 2014·Animal Cognition·T V ShephardN Hempel de Ibarra
Mar 30, 2021·Ethology : Formerly Zeitschrift Für Tierpsychologie·LomaJohn T PendergraftJohn M Marzluff
Jun 3, 2021·Animals : an Open Access Journal From MDPI·Lisa HornJorg J M Massen

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