What are the uses of sparrows?

What are trumpeter swan its special features or adaptation? When and at what age do baby birds start flying? What is the value of a bald eagle quarter? How do you keep a bird from nesting in your door wreath? What is the wing span of a magpie? How do puffins breath? How many times a year do blue jays nest? Why do flamingos change colour when they eat? What is the thing called that hangs over the doors? What does The Mottled Duck eat? What are the best breed of ducks for hatching? What is a seagull's habitat? Does a swan have an external shell? How long does a grouse live? Can you keep a duck for a pet? Why does a wild goose lay an egg on top of your garden in the mulch leave it for a week and then one day it is gone with out a trace? Passerine birds have specialized tendons that allow them to what? How big is a kiwi's egg? How many different eagles are there in Kenya? What is the best feather bed for under 200?