Birds are going extinct: Entire species are hanging on by their wingtips

"Deforestation and the pet trade have ravaged avian populations, and the consequences for mankind could prove dire." That's how Salon introduced an excerpt recently posted from The Annihilation of Nature: Human Extinction of Birds and Mammals by Gerardo Ceballos, Anne H. Ehrlich, and Paul R. Ehrlich. The excerpt originally appeared on Earth Island Journal, and you…