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Conspicuousness of a flush-pursue predator, the painted redstart [Myioborus pictus L.]: an experiment using bird models in a breeding habitat

100%

Jablonski P. G.

Polish Journal of Ecology

2004

tom 52

nr 1

White patches in the Painted Redstart (Myioborus pictus) are adaptations to flush prey during flush-pursue foraging which is characteristic for this species. Conspicuousness of white wing patches was measured in terms if time needed for a human observer to find a taxidermic model in a natural habitat. The time to find a model without patches did not differ from the time to find a model with white patches, indicating that white patches do not confer higher conspicuousness to non-moving redstarts. The results are discussed in terms of predation risk from such visually orienting predators as hawks or pygmy owls, and in comparison to other Myioborus species, all which do not posses the white wing patches.

The painted redstart [Myioborus pictus L.] search rate of a cryptic versus conspicuous prey: a field test of optimal search models

100%

Jablonski P. G.

Polish Journal of Ecology

2003

tom 51

nr 3

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.

Painted redstart [Myioborus pictus] song: preliminary analysis of song production rate

84%

Cygan J. P., Jablonski P. G.

Biological Bulletin of Poznań

2000

tom 37

nr 1

Ograniczanie wyników

2 Polish Journal of Ecology

1 Biological Bulletin of Poznań

3 Jablonski P. G.

1 Cygan J. P.

1 2004

1 2003

1 2000

Wyniki wyszukiwania

Conspicuousness of a flush-pursue predator, the painted redstart [Myioborus pictus L.]: an experiment using bird models in a breeding habitat

The painted redstart [Myioborus pictus L.] search rate of a cryptic versus conspicuous prey: a field test of optimal search models

Painted redstart [Myioborus pictus] song: preliminary analysis of song production rate