Sexual Dimorphism

Some bird species are sexually dimorphic, where males and females look different. Male and female blue jays look the same and are not sexually dimorphic. Male northern cardinals are more brightly colored than females and are.

male violet-backed starling (Toledo Zoo)

female violet-backed starling (Toledo Zoo) The Cleveland MetroParks Zoo is too hard on her.

 

female (left) and male Siamese firebacks (Toledo Zoo)

male Bornean crested fireback (Toledo Zoo)

female Bornean crested fireback (Toledo Zoo)

female Andean cock-of-the rock (Toledo Zoo)

male Andean cock-of-the-rock (Toledo Zoo)