There was a time when waiters would try to shoo away the cheeky house sparrows (Passer domesticus) that flit around European sidewalk cafés in search of crumbs. Where I live, at least, they now seem have given up: outnumbered, outmaneuvered, and with any scant success reversed by patrons who toss birds tidbits. It's dynamic holds mirror our love–hate relationship these little creatures (Figure ...