Down here in Texas they can be seen year round, according to Howard Garrett (The Dirt Doctor, of organic gardening fame, who always signs off his radio program "and don't forget to feed the birds!"). I had a couple of them bobbing and weaving through the vitex on Sunday when I was out in the yard doing a little transplanting. They may be coming through from the north, because I actually haven't seen as many over the summer as I'm seeing this fall.

SRS