A ridge on the sternum

Soft, fluffy feathers found close to a bird's body

This type of bill extracts nectar from deep within flowers

Feet designed for wading in shallow water

Hinged jaw enabling the bill to open widely

Used to grind food and make it more easily absorbed

Strong feathers found on a bird's body, wings, and tail

This bill has an upper mandible that extends beyond the lower mandible, and hooks downward in front of it

Feet that have many have toes connected by strong, flexible skin to form paddles

This type of bill is long for spearing fish, frogs, crayfish, and snakes

A food storage sac in the bird's esophagus

Feathers extending from a bird's "hand" to the tip of its wings

This type of bill is good for cracking hard seeds

Feet with three forward toes and one hind toe - found on songbirds

Feet with two forward toes, and two hind toes, allowing the bird to climb up or down with equal ease

Produces oil that birds spread over their feathers

Retractable group of feathers supported by a birds "thumb" bone

This type of bill is large and spatula-shaped for scooping small aquatic animals from the water

Feet with sharp, curved talons to easily pierce the flesh of small animals, and grasp prey during flight

straight, strong, and pointed for a diverse diet of insects, fruits, eggs, crustaceans, and flesh

Produces sound without vocal cords

Pulls the wings down to produce the power stroke

This bill is long and slender to easily retrieve burrowing crustaceans

Feet with three forward toes and only a very small hind toe, or none at all