Exam 21: Avian Anatomy and Physiology

Which order of birds is comprised of perching birds such as crows, swallows, and songbirds?

What type of feather, located at the nape and upper back, has follicles that contain sensitive nerve endings that play a sensory role in controlling feather movement?

The purpose of the gizzard is to

The bony ridge on the sternum of strong flying birds is the

A zygodactyl bird has

The atlas is attached to the __ by a single condyle in birds.

In order to prevent heat loss in birds,

The web-like flattened part of a feather that lies on either side of the main feather shaft is the

An anisodactyl bird has the following toe arrangement:

The unpaired air sac in birds is the

Red muscles are the predominant muscle type in a

The columella is the

The smaller flight muscle that causes the upstroke of the wing is the

The mouth and nasal chambers in birds are joined by internal nares called the

How many air sacs make up the avian respiratory system?

The tiny opening on the feather shaft where the webbed part of a feather begins is the

The pelvic girdle is made up of the

What type of feather serves a bird's sense of touch?

What type of feather provides waterproofing for a bird?

Grandry's corpuscle and Herbst corpuscle are located on the