Shell-dropping: decision-making and optimal foraging in northwestern crows
Zach, R. (1979). Shell-dropping: decision-making and optimal foraging in northwestern crows. Behaviour (Leiden) 68(1-2): 106-117
In: Behaviour (Leiden). Brill: Leiden. ISSN 0005-7959; e-ISSN 1568-539X, more
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