A pair of kestrels (small falcons, a little bigger than a dove, who eat rodents, bugs, and sparrows, which is why they are sometimes called sparrow hawks) has taken up residence in Carroll Gardens on the corner of Clinton and Sackett Streets. I first saw them last week when I was coming out of the public library and heard an unfamiliar call, definitely a raptor. Looking up I found them perched on an old TV aerial. Dr. Bob DeCandido, who knows a whole lot about kestrels, helped me confirm the ID. And this morning I got a decent recording of them (listen all the way to the end to hear a bicyclist bump into me).