American kestrels are tiny, colorful and feisty. Attitude-wise, they’re the chihuahuas of the avian world: They’re unafraid to take on much larger birds, ready to backstab turkey vultures and ...

The number of American kestrels has dropped sharply. That goes against the trend for birds of prey, broadly seen as a conservation bright spot. A tagged kestrel in Harmony Township, N.J., held by John ...