1. American Ornithologists’ Union. 1895. Check-list of North American birds. New York.
2. Double-crested cormorant culling in the St Lawrence River Estuary;Bédard;Colonial Waterbirds,1995
3. Butler, R.W. 1992. Great Blue Heron. In The Birds of North America, No. 25 A. Poole, P. Stettenheim, and F. Gill (Eds.). Philadelphia: The Academy of Natural Sciences; Washington, D.C.: The American Ornithologists’ Union.
4. Recent changes in the abundance and distribution of double-crested cormorants in the St. Lawrence River, Estuary and Gulf, Québec. 1978–1990;Chapdelaine;Colonial Waterbirds,1995
5. Cuthbert, F.J., McKearnan, J.E., and Joshi, A.R. 2001. Distribution and abundance of colonial waterbirds in the U.S. Great Lakes: 1997–1999. Draft report to USFWS.