The red-headed agama (Agama agama ... is one species of macaw that has vibrant blue feathers. In 2000, this bird, native to Brazil, was declared extinct in the wild, and there are only a few ...

When white light strikes a blue feather, the keratin pattern causes red and yellow wavelengths to cancel each other out, while blue wavelengths of light reinforce and amplify one another and ...

The scarlet macaw is a species of large parrot with red, blue and yellow feathers. The rare birds, which probably came from the Gulf Coast region of Mexico, were a sign of prestige and their ...