The Red-winged Blackbirds show up in springtime on the northwest corner of the park for a noisy mating and breeding party that lasts three months. It must be a great party because stray males show up months afterwards, or months before, as if to catch the vibe in the off season. The females are better grounded and don’t show up. Their absence makes the males’ enthusiasms pointless. But that doesn’t stop them. The video shows a male performing the territorial call: You other males stay away, you females come here. I saw three or four other males, but no females.