Our yard is overrun by these little guys, right now. We maintain a healthy population of them all year 'round, but over the past month, their numbers have increased fairly dramatically. We've been watching the males challenge each other, chasing each other around the yard, spinning together and falling towards the ground, only to part and fly upward at the last minute. They're so pretty, and so entertaining... I just wish they wouldn't eat the lilac buds.