Dimorphisme sexuel I
Exemples de différences d'apparence des mâles et des femelles d'une même espèce d'oiseaux, de mammifères et d'insectes (comparer sur la même photo).
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Passer hispaniolensis
Moineau espagnol
L’accouplement. Colonie reproductrice au sein du nid de Ciconia ciconia.
Portugal, distrito de Beja, São Marcos da Ataboeira.
28/04/2018
BE044'05-180428071'JJK
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