Zygodactyl Foot

This unique foot can be found on woodpeckers, owls, most parrots, and other birds.  It is the second most common toe arrangement.  In this foot the first (hallux) and fourth digit face backwards while the second and third digit face forwards. 

In woodpeckers, this type of foot is excellent for clinging to the trunks of trees.  The tow toes in the back give the bird more support.  For parrots, this type of foot is excellent for holding food.  Parrots often feed by holding their food in one foot and bringing the food up to their beak, just like we use our hands to eat.  Although owls have this toe arrangement, they have the special ability to rotate their fourth digit to the front.  This helps the owl perch, hold its food, and grab its prey.