Male and female frogs in amplexus. The male is holding on to the female and will fertilize her eggs as she releases them.
Recently (early Aug. 2012) I discovered several cope’s gray treefrogs gathering around the edge of our kiddie pool. They were calling for females. Later that evening I went out to check on them and was excited to find that a female did show up. When I woke up in the morning I found 3 to 5 hundred eggs in the pool. Keep an ear out for these beautiful frogs. Your best bet is at night during or just after it rains.
Another male calls for a mate.
On a side note, if you have an inflatable style kiddie pool and there are treefrogs in your area, make sure you leave in a stick or similar item in the pool providing an exit route. It is not a bad idea to also leave something in that floats: a Frisbee for example. We think of frogs living in ponds but treefrogs live up in trees or in bushes. They can drown in “ponds”. I found several treefrogs that drowned in only 3 inches of water (in a blow-up pool). Sad indeed. All our other “ponds” (made of hard plastic or galvanized metal) never had this happen. Perhaps because the inflatable pool was nearly empty making the sides lean in making it hard for them to get out.