Category
page 1Morphas
polymorphism
in biology, occurrence of two or more clearly different morphs or forms in the population of a species

Salmo trutta fario
river-dwelling freshwater predatory fish from the genus Salmo of the family Salmonidae, one of the three main subspecies of the brown trout (Salmo trutta)

sea trout
subspecies of brown trout

Sharpe's Rail
species of bird
pied raven
colour morph of the North Atlantic subspecies of the common raven