Predation risk and vigilance in the blue
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Dennis William Lendrem
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Article
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1983
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Springer
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English
β 499 KB
Feeding blue tits (Parus caeruleus) increase their scanning rates as predation risk increases. However scan durations remain constant. As risk increases the frequency distribution of inter-scan intervals shifts from a regular (rectangular) to a random (exponential) distribution with a 0.5 s constrai