The bill is thin and pale gray. Breeding male: blue-gray above, including most of head and back. Crown has a black line at the forecrown that extends along the sides of crown; white eye ring ...

The deepness of the blue in the eggshell depends on the concentration of biliverdin. Sometimes the color might range from a greenish-blue, or a paler blue and every color in between. Here are 15 ...

The blue-billed curassow is the world's most threatened species of cracid, a family of beautiful crested game birds found primarily in Latin America. This large, mainly black bird is the only curassow ...