When I was growing up, in Manitoba's parkland region, I never saw a turky vulture up close. That being said, every fall when we were killing chickens (fall harvest) we would get about twenty of them circling high overhead--just like in the movies. Since we did not leave out any carcasses (or anything else) for them, they would simply move along.
You could tell from their size, shape and colouring, that they were turkey vultures and not ravens, crows, magpies, hawks, or anything else. That is how we knew they were in the area, but we never saw them at any other time.