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Dec 27 2011

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Effects of predation risk on diurnal mass dynamics and foraging routines of yellowhammers (Emberiza citrinella)

Yellowhammer (Emberiza citrinella) Science Article 6

abstract

Theoretical models predict that when having fat reserves is costly in terms of predation risk, birds should decrease their levels of fat reserves in response to increased predation risk. I performed an experiment in which yellowhammers were exposed to a control treatment, where a curtain was moved several times a day, 5 days in a row, and then to a predator treatment, where a perched, stuffed sparrowhawk appeared when the curtain was moved, 5 days in a row.

Ineke T. van der Veen, Behavioral Ecology Vol. 10 No. 5: 545-551

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