Also known as Audubon's crested caracara, this species is the rarest Florida bird and is listed by the U.S. Fish and Wildlife Service as threatened. In this photo the male is about to land on the back of the female who has assumed a submissive posture.
A great blue heron approaches its nest with a twig which it will present to its mate. The female will add the twig to the nest. This is a bonding behavior among herons and other species.