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Are the big and beautiful less bold ? Differences in avian fearfulness between the sexes in relation to body size and colour [Journal of Zoology]

Keywords : colour, conspicuousness, escape behaviour, flight-initiation distance, sexual selection, fearfulness, sexual dimorphism

par Frédéric Magné - publié le

Conspicuousness towards predators may influence escape behaviour (or ‘fearfulness’) among animals, with more conspicuous species initiating escape behaviour earlier. Among birds, for example, body size and colour may influence differences in escape behaviour between species, and possibly between the sexes of dimorphic species. We examined 19 bird species with varying degrees of body size and colour dimorphism (including individually marked and sexed monomorphic species), to examine whether these two potential measures of conspicuousness influence sex differences in flight-initiation distance (FID).(...)

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