The previous answer here was:
"Because The United States of America is a horrid country that does not let people experience their spiritual side."
This is absolutely wrong. Though, to be sure, it is a real inconvenience that one must have a permit to own a feather found lying on the ground, it is a law that is in place for good reason.
The government has no way of knowing (and likewise, you have no way of proving) where, when and how your feather was obtained. You could have found it while on a hike or you could have illegally shot an owl to get it.
For example: One person could own ten owl feathers (or those of any other raptor) which were found over the course of months of treks in the woods. Another person traps and kills wild owls and collects ten feathers. Both of these people show you their finds. Now, can you tell who's the poacher? Neither can the government.
The U.S. does its best to allow for native (and all other) religious practices. This is why peyote is available legally to native tribes and not the rest of us. But even they have to prove who they are and how they will use this permission (to own and use but not to sell). The same goes for feathers.
Contact the Fish and Wildlife Service to see what you'll have to do to get a permit for owning raptor feathers in your state.
because it's illegal, and some laws are stupid
Any except for endangered species or bird of prey.
In most countries it is ILLEGAL to collect or POSSES wild bird eggs.
how the feathers protect the bird
As far as we know, there is no bird living without feathers.
how the feathers protect the bird
It will not be able to fly with no feathers. Feathers keep a bird warm. If its feathers are gone it will die of cold. Most importantly feathers help a bird to escape from predators.
Down feathers are feathers that lie under a birds body and primary feathers. These feathers are small and puffy, and trap warm air under a bird's feathers.
Another name for bird feathers is down.
They 'pren' their feathers
Feathers that are on the neck of a bird.
Bird bones because feathers are very light and the bones just depend on the type of bird.
we are asking is there not a baby bird with yellow veins in its feathers