No, they aren't blood feathers. If you cut them, it wouldn't hurt, but if you pulled them out, it would.
The Cockatiel have 10 primary feathers and 10 secondary feathers.
Yes. All eagles have feathers on their heads.
Young grey cockatiels will usually get yellow wing and tail feathers, and coloured cheek patches as they mature.
sparrows, finches, budgies, cockatiels, blackbirds, thrush, canaries, chickens, yellow heads
The most common issues that cockatiels have are vitamin and calcium deficiencies. Common diseases are: polyoma, yeast infections, and sarcocystosis.
If by this you mean why do cockatiels have crests then its because it frightens predators, larger birds and if it dislikes a person it may raise it to frighten him/her Cockatiels are small members of the cockatoo family. All cockatoos have crests. These birds may raise their crests when they are startled, or flatten them when they are angry.
depends on the feeling and whether they are horny or not.
Yes, cockatiels can get parasites.
Cockatiels are a type of cockatoo.
Most vultures have naked or nearly naked heads, to prevent getting the feathers there fouled. Also, vultures have a highly developed olfactory senses, to locate dead animals by smell. The beak is shaped to tear soft, decaying flesh. Vulture beaks are not as powerful as raptor beaks.
Cockatiels preen each other. This may appear as though thy are pecking at each other's heads.
Cockatiels are really easy to tell the sex of. All female cockatiels are dull colored like gray white or brown but male cockatiels have larger crests on their heads and are usually gray or white with some bright colors like yellow on the body or little red dots on each cheek.