Feeding innovations and forebrain size in birds

Article Abstract:

A study to devise a direct estimate of feeding innovation rate in the field for the different orders of birds was presented. Absolute and relative frequency of innovations are related to forebrain size but the frequencies are variable between bird orders. Innovation rate may be a useful measure of behavioral plasticity for it is based on actual field observations rather than tests constructed by human experiments for captive animals. Predicted trends linking opportunism, brain size and rate of structural evolution was confirmed.

Physiological aspects, Birds, Animal behavior, Animal anatomy

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Mixed-species aggregations in birds: Zenaida doves, Zenaida aurita, respond to the alarm calls of carib grackles, Quiscalus lugubris

Article Abstract:

A study aims to characterize the responses of zenaida doves, Zenaida aurita, to predators, and to determine whether doves respond with antipredator behavior to the alarm calls of a closely associated species, the carib grackle. Results reveal that zenaida doves suppressed foraging both in response to a model predator and in response to the sound of grackle alarm vocalizations.

Alarm responses (Animal behavior), Alarm signaling (Animal communication)

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Mind the gap: means-end discrimination by pigeons

Article Abstract:

The results of experiments conducted to examine the ability of pigeons to perform means-end tasks are discussed.

United States, Animal intelligence

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