00000nam 2200000za 4500 9.857804 CaOODSP 20241203113643 cr ||||||||||| 180615s1998 oncb o f000 0 eng d CaOODSP eng eng fre nl----- CW69-5/272E-PDF Blokpoel, H., 1938- Atlas of colonial waterbirds nesting on the Canadian Great Lakes, 1989-1991. Part 5, Herons and egrets in 1991 [electronic resource] / Hans Blokpoel, Gaston D. Tessier. Herons and egrets in 1991 Nepean, Ont. : Canadian Wildlife Service, Ontario Region, c1998. iv, 36 p. : maps. Technical report series ; no. 272 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 19-21). "During the 1991 breeding season an inventory was made of Great Blue Herons (Ardea herodias), Great Egrets (Ardea alba) and Black-crowned Night-Herons (Nycticorax nycticorax) nesting in the Canadian portions of Lake Huron (except for the waters surrounding Manitoulin Island) and the lower Great Lakes, including Lake St. Clair and the upper St. Lawrence River. Canadian Lake Superior was not surveyed in 1991, so 1989 data are used as substitutes in this report"--Abstract. Issued also in print format. Includes abstract in French. gccst Aquatic birds gccst Population distribution gccst Lakes Herons Egrets Tessier, G. D. Canada. Environment Canada. Canadian Wildlife Service. Ontario Region. Atlas of colonial waterbirds nesting on the Canadian Great Lakes, 1989-1991 : (CaOODSP)9.613677 Technical report series (Canadian Wildlife Service) no. 272. (CaOODSP)9.504438 PDF 1.54 MB https://publications.gc.ca/collections/collection_2018/eccc/cw69-5/CW69-5-272-eng.pdf