green frog on rocky shore - lithobates clamitans

green frog lithobates clamitans rocky shore rana commonly species native eastern north america two subspecies bronze northern frog mid-sized true frogs heads body brown gray dark green head prominent individuals side back darker colored colder days help absorb heat name typically varying degrees heads display territoriality males primary actors associated water variety habitats living margins shallow freshwater ponds road-side ditches lakes swamps streams vernal pools temporary frogs