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American Coot?
Larry Bird.
It is a large sea bird that is often white with black at the end of their wings.
ostrich
Here. Type in "xeme." The bird has a black head and a white body. The tips of its wings are black.
A large white sea bird with black tipped wings is a Gannet. I don't know if they are seen in then Great Lakes
could be ptarmigan
A bird that is black with white spots on its wings might include the ivory billed woodpecker or the jackdaw. This might also be the tri-colored black bird.
Puffin maybe
It is a male Goldfinch.
A hermit thrush is one example.
If it was about 18 - 22 inches tall and had a long pink beak, it was probably an American White Ibis, Eudocimus albus. Many gulls also have black tips on their wings. Black pigment makes the feathers more wear-resistant.