(Springer) Dive bombing a much larger bird isn't just a courageous act by often smaller bird species to keep predators at bay. It also gives male birds the chance to show off their physical qualities in order to impress females. This is according to a study, led by Filipe Cunha, in Springer's journal Behavioral Ecology and Sociobiology on predator mobbing behavior of birds where potential prey approach and harass would-be predators such as owls.
from EurekAlert! - Social and Behavioral Science http://ift.tt/2m7XQSA
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