Both male and female pigeons produce a kind of milk in their crops to feed their babies. Try to think of them as a resource. The proliferation of pigeons brought peregrine falcons to downtown Phoenix. A dozen or so of the endangered birds live here. These are birds with an image so imposing that a firm of personal injury attorneys is probably contemplating its use in an ad campaign.
Falcons are here thanks to pigeons.
Without pigeons, downtown Phoenix would be without that special drama of interspecies prey and predator. Hildebrandt and others have been studying the falcons as part of the Game and Fish Urban Peregrine Falcon Project for several years. Peregrines winter here. Pairs apparently come back year after year. Hildebrandt speculates that it's too hot here in the summer for rearing chicks.