Breeding display
Breeding behaviour in birds, reptiles and amphibians.

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Breeding display
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Uca sp.
Decapoda, Ocypodidae
Male during a waving display.
Brasil, Rio Grande do Norte, Baía Formosa.
11/27/2011
IS007'02-111127107'JJK
Det. José Roberto Pujol Luz
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The genus Uca shows strong sexual dimorphism manifested by extensive development of one of male's claws. Large claw, that represents almost a half of body weight, is used for territorial fighting and for a waving display.