Sexual dimorphism I
Examples of differences in the appearance of males and females of the same species of birds, mammals and insects (compare on the same photo).
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Passer hispaniolensis
Spanish (=Willow) Sparrow
Mating. Breeding colony within the nest of Ciconia ciconia.
Portugal, distrito de Beja, São Marcos da Ataboeira.
4/28/2018
BE044'05-180428071'JJK
