The national bird of the United States

A way that land birds take a bath in the dust to rid themselves of parasites

The nutrient-rich fluid that feeds an unhatched chick

The type of flight used by a hummingbird to remain stationary in the air

A type of bird home

The largest living penguin

A bird does this to rid itself of mites and other parasites, or to relieve the skin irritation by the growth of new feathers

This allows chicks to develop properly by keeping them warm

The type of feet - three forward toes and one hind toe, that songbirds have

Built in knowledge, given by God, that birds possess at birth and don't have to learn

The largest living bird

The regular movement of animals between their habitats, usually yearly

The name of the place a bird loses feathers , when sitting on its eggs, to transfer heat to their eggs more effectively

The type of flight that allows birds to coast "downhill"

A scientist who studies birds

The smallest of all birds that beats its wings 80 times every second

A behavior where a ground-nesting bird sneaks away from its nest in thick grass, because it senses a predator's approach, by running rapidly along the ground

These types of chicks are featherless and helpless when they hatch

The type of flight that uses thermals to gain altitude without expending energy

The substance feathers and bills are made of

A robin-sized raptor with distinctive "ear" tufts

When flocks of small birds harass a hawk, or other predatory bird that is perched in or near their territories

A group of birds that does not provide any parental care for their young

The type of flight in which birds use alternating flapping with gliding or coasting to save energy

Colors, patterns, and marking that are characteristic of a specific bird species