The following was excerpted from CK-Times.ca  http://www.cktimes.ca/naturalhabitats/

Natural Habitat Areas   with Blake Mann,

Lake St. Clair is also the main staging area for migratory waterfowl in Ontario. In 2000, the eastern Lake St. Clair area was designated as an Important Bird Area. Not surprising, many species may be seen flying overhead. Swans are a good example in the spring. They may be seen in large flocks during the month of March. Resting flocks may be observed in fields around Wallaceburg.


ST. CLAIR NATIONAL WILDLIFE AREA
[approx. 30 km SSW of Wallaceburg on Townline Rd at end of Heron Line.]

This wildlife sanctuary on the eastern shore of Lake St. Clair is a unique place to observe both nesting and migratory waterfowl.

It is largely a manmade marsh, which was originally a pasture prior to WW II. In 1940, it was acquired by a hunt club and converted into a wetland for hunting. In the middle 1970's it was converted into a wildlife sanctuary.

A wide variety of birds, fish, snakes, turtles and frogs live there. These can best be observed on the trail (5 km return)that runs atop the dyke, extending through the centre of the marsh. A centrally located viewing tower gives an excellent panoramic view.

Wildlife "spectacles" tend to be concentrated in the spring and fall. For birders, over 180 species can be observed in one year. During migration, up to 20,000 ducks may use the sanctuary at one time. Rarities in the past have included a Snowy Egret, Glossy Ibis, Vermilion Flycatcher and Tricolored Heron. A White-winged Dove was seen nearby in July 2002. Every summer one is almost guaranteed to see Yellow-headed Blackbirds, a more "westerly species". The trail is open daily, year-round.

For more information, contact: Marsh Manager, St. Clair National Wildlife Area, R. R. #1, Pain Court, Ontario.
phone: 354-1418.
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More information at : http://www.carolinian.org/CarolinianSites_StClairMarshes.htm