Search for conspicuous versus cryptic prey
Polish Academy of Sciences. Institute of Ecology
Polish Academy of Sciences. Institute of Ecology. Publishing Office
Strony 385-388 : ilustracje ; 27 cm ; Bibliografia na stronie 388
Models of optimal search rates predict that predators increase the search rate when availability of conspicuous prey increases relative to cryptic prey. I tested this prediction by comparing foraging hop rates by 19 Painted Redstarts (Myioborus pictus) - insectivorous birds in Arizona, USA. Redstarts often use flashy displays of open wings and tail to flush their prey and to subsequently chase the prey in air. Such flush-displays make the prey conspicuous and easy to detect. Hence, foraging mode affects relative availability of conspicuous versus cryptic prey: birds foraging with frequent flush-displays encounter conspicuous prey more often then birds foraging with infrequent flush-displays. As predicted, the hop rates during foraging with infrequent flush-displays were lower than hop rates during foraging with frequent displays.
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Muzeum i Instytut Zoologii Polskiej Akademii Nauk
Biblioteka Muzeum i Instytutu Zoologii PAN
4 lut 2022
18 mar 2020
92
https://rcin.org.pl/publication/91641
Kruuk, H. Hewson, R.
Gliwicz, Joanna
Bright, P. W. Morris, P. A.
Venkataraman, A. B. Armugam, R. Sukumar, R.
Doolan, S. P. Macdonald, D. W.