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General Information
CONTENTS
Bird Extremes State Birds
Bird Body Parts
Bird Body Parts
How Birds Fly
How Birds Fly
A bird is able to fly mainly because the pressure of the air on top of its wings is less than the pressure below.
The Skeleton of a Typical Bird
The Skeleton of a Typical Bird
is especially suited for flying. Each bone is as thin and small as it can be and still be strong enough to support the bird's body.
Wing Shapes
Wing Shapes
Air Sacs
Air Sacs
Thin-walled pouches found in various parts of a bird's body are connected directly to the lungs and form a part of the animal's bellowslike breathing mechanism.
Types of Beaks
Types of Beaks
A Bird's Foot
A Bird's Foot
A sleeping bird cannot fall off a twig or branch.
Where and How Birds Build Their Nests
Where and How Birds Build Their Nests
Types of Bird Feet
Types of Bird Feet
How Big Are Birds' Eggs?
How Big Are Birds' Eggs?
The largest egg is about 6 inches long and weighs about 3 pounds, while the smallest is barely 1/2 inch long and weighs less than 1/50th of an ounce.
Feathers
Feathers
Birds could not fly without feathers. The thick coat of feathers streamlines the body and helps the bird glide smoothly through the air, and also helps keep the body warm.
The Shape of Birds' Eggs
The Shape of Birds' Eggs
Almost all birds' eggs are roughly oval in shape, and there are a few good reasons for this fact.
The Robinson Library >> Science >> Zoology >> Birds