Doohan, before you start blasting, you ought to figure out what kind of bird you are dealing with. Right now, we have a lot of ducks that are called "divers" because they dive to eat plants from the bottom of the lake. It sounds to me like you might have Hooded Mergansers which eat invertibrates and other small animals.
As a group, I think we really need to get much better at identifying species that are not game fish or whitetail deer. I certainly don't want to be inflamatory about this. But to jump from the description Doohan gave to cormorants is like someone describing a LMB and us jumping to the conclusion that it is a alligator gar.
