Species Maps

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