In my neck of the woods we call them water turkeys. They are vicious predators on our catfish ponds. In the 90's we obtained a special "permit", for lack of a better word, to shoot them as long as we were on our ponds. Catfish ponds are a major source of income and are intentionally overstocked for harvest. A cormorant can eat a bunch of catfish in a short timeframe, especially when the water depth is less than 6 ft and the fish are on 6" centers...
We despise them.