Species Maps

	Green Heron (Butorides virescens) Breeding Bird Atlas blocks All observations (not just breeding activity) between 1987-1995 (9 square miles/block)
	Green Heron (Butorides virescens) NatureMapping observations by townships during the breeding season. (36 square miles = township)
	Green Heron (Butorides virescens) NatureMapping observations by townships throughout the year.