Hawks and falcons are equally fascinating ... a hawk's—at least in the case of the peregrine falcon (max 43 inches) or American kestrel (24 inches) compared with the red-tailed hawk (52 inches ...

Avid birdwatchers call the Perigrine Falcon the fighter jet of the animal kingdom. That seemingly arbitrary comparison has our noggins jogging. How exactly is a Peregrine Falcon like a fighter jet?

Back then, in 1973, only 12 pairs of peregrine falcons perched at nest sites over a 180-mile stretch of river. Ambrose saw that number rise to more than 60 in 2012. The birds’ subsequent rebound ...