Fourteen orange-headed bird species are showcased for their vibrant plumage and unique characteristics. These birds, found ...

American white pelican has a large, heavy beak that's yellow-orange in color. Besides catching fish, pelicans use their bills to get rid of excess salt ...

The two-colour discs had different pairs of colours selected from an orange-to-red spectrum. This mirrors the colour range found in the male songbird beak. One idea was that the birds would be ...