There are a lot of "what ifs" when you're a kid: "What if a bee stings me?" "What if I forget my lines in the school play?" "What if people don't like me?" At the heart of all these questions is a ...
Wonder and diversity of birds -- Birds's body -- Feathers: form and function -- Birds in motion -- Finding food -- How birds communicate -- Seeking a mate -- Ready reference: evolution of birds -- ...
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