Sexual dimorphism II
Examples of differences in the appearance of males and females of the same species of arthropods, birds and mammals (compare on successive photos).
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Spatula clypeata
Northern Shoveler
Female.
Portugal, distrito de Faro, Olhão, Parque Natural da Ria Formosa.
12/23/2017
AE067'06-171223018'JJK
