Flying birds


 * This key has not yet been written.

When writing it, here are a few examples of birds to think about:


 * Ducks, geese, and swans
 * Herons and allies
 * New World vultures
 * Old World vultures
 * Plovers
 * Doves and pigeons
 * Hummingbirds
 * Woodpeckers
 * Falcons
 * Tyrant-flycatchers
 * Crows and jays
 * Swallows and martins
 * Tits
 * Thrushes
 * Mockingbirds and thrashers
 * Starlings
 * New World warblers
 * Old World warblers
 * New World sparrows
 * Old World sparrows
 * Cardinals
 * New World blackbirds
 * Old World blackbirds
 * Finches