Birds are the only animals with feathers. They have two main types. Strong, lightweight contour feathers give birds their coloring and shape. They help the birds steer while flying. Soft, fluffy down feathers give adult birds a layer of protection next to their skin. Down feathers cover the bodies of young birds."Actual information from a book, better use it, 'cause you'll probably need it for the Seventh Grade, right... ? I would know, since I am one. :D"
Birds' contour feathers are responsible for giving them their streamlined shape, which helps reduce drag during flight. Coloration in birds comes from a combination of pigments in the feathers as well as structural colors created by the arrangement of the feathers themselves.
Contour feathers are long, strong, and smooth, while down feathers are soft and fluffy. Contour feathers give birds their coloring and shape and are used in flight. Down feathers provide a layer of insulation.
feathers
Down feathers are the soft under plumage found beneath the outer, tougher feathers of birds, typically of waterfowl such as ducks and geese. They are known for their insulating properties, providing warmth while remaining lightweight. Down feathers are commonly used in bedding and clothing to create warm and cozy products.
Duck down is a layer of fluffy, not water-proof feathers that grow close to the skin, and all over a young duckling. Their purpose is to keep the duck warm in cold conditions. Other feathers on a ducks are generally waterproof, and are designed to help keep water away from down, aid in flight and cover the body. ~BlackWolf1112
If a bird were to give birth, it would not be considered a bird, but a flying mammal with feathers.
Birds have feathers and light hollow bones. Mammals have fur or hair and heavy bones. Bird have a gizzard to break down food. Mammals only need a stomach. Birds lay eggs. Mammals give birth to live young.
Bats have fur but birds do not. Bats are mammals that give birth to live young, whereas birds give birth by way of the laying of eggs.
1. Mammals have fur; birds have feathers. 2. Mammals produce milk; birds do not. 3. Mammals are synapsids by descent; birds are diapsids by descent.
Feathers provide insulation to regulate body temperature, aid in flight for birds, and can be used for attracting mates or camouflage. Additionally, feathers are lightweight and help birds maintain their streamlined shape for efficient movement.
If there are two or more in the same cage, one of the other birds is pulling them out.