Doohan, if the picture fits, it is a crested cormorant or some other type of cormorant. They are commonly called water turkeys. They are called a lot of other things too. Yep, if it has a sharp bill and dives, it's not a vegetarian.
It is against federal law to harm it. However, it is also against the law to shoot a chicken hawk that is getting your chickens. I would take care of business but keep my mouth shut. BTW, they don't taste just like chicken.
