It could be the moose, but I'm guessing not. As you said, moose is more common in colder weather - probably not cold enough yet in NY state if that's where the car is.
I think of the moose as a 'hooting' noise, almost like a foghorn in the distance.
Jason
current 95 Contour SE (V6) MTX owner
former 96 Mystique LS V6/MTX owner