Pierella is a butterfly genus from the subfamily Satyrinae in the family Nymphalidae found from Mexico through Central America to South America. The species of Pierella have larger hindwings than fore
In zoology, a scale is a small rigid plate made out of keratin that grows out of vertebrate animals' skin to provide protection. In lepidopterans, scales are plates on the surface of the insect wing,
Keeled scales of a colubrid snake (banded water snake; Nerodia fasciata)
Placoid scales on a lemon shark (Negaprion brevirostris)
Cycloid scales on a common roach (Rutilus rutilus)