Can change between dark and light green depending on temperature and lighting. Perches by day on upright cattail or other plant while legs are tightly tucked under body. Breeds late May to August. Males call, sometimes in large choruses, from button bush, swamp rose, lily pads, or other shoreline plants, and calls sound like a series of metallic honks, similar to cow bells or barking dogs. Eggs are laid under water surface and are attached to roots of floating vegetation.
Embryos hatch in a few days and tadpoles transform in two months.
Juveniles often feed in nearby grassy fields in late summer and autumn. Has been introduced in a few areas north of its natural range.