These birds, which can swim great distances underwater and dive deep too boot, will chase fish down and just keep eating until they simply can't fit any more in their stomachs. The cormorant in the photo has a trout, but if you Google images, you'll find the same shot with everything from crappies, to bluegills, to catfish, to bass. I've heard anglers gripe about the birds cross-country, and have personally witnessed them chasing down fish as far inland as Lake Barkley in Kentucky. Back in the late summer, I watched a cormorant on one of my favorite local carp ponds scare fish in the shallow water for hours. Eventually the bird managed to subdue a carp that weighed about four pounds.