These raptors stand over 4 feet tall - mainly due to their long legs. Secretarybirds have beautiful eyes and an impressive curved beak. Their most distinctive feature is the 20 or so black crest feathers that can be grouped and tucked behind their heads. Secretarybirds pair for life. The nest is generally placed low in the fork of a tree, usually an acacia. They trod up to 20 miles a day looking for a delectable treat. What's their favorite? A yummy snake.