Hyla femoralis. These seem to breed in more acidic water, and come to civilization a little less often than others, but they are still fairly common, and can be heard calling from a variety of places, especially ahead of a storm! Their call is "Morse Code"-like, and can be easily recognized as they call from the wooded shoreline of a marsh or small pond, or from the trunks of trees standing in shallow water. These were taken near St. Augustine, Florida.