Along with the crook in it's neck, the hooked beak and its huge webbed feet, the eye color is the most notable thing about this large water bird. The aqua-marine (or some say turquoise) eye-color only shows up in the right light. Also, the eye is rather small compared to other animals of its size, making it harder to capture in photographs. But you'll see lots of it in cormorant photos here on DA. We currently have a few hundred double-crested cormorants at our small lake (in the middle of Kansas, if you can believe that.) So I get to see them most every day in the spring and fall in particular. They are, rather shy (at least here they are) and getting close enough to get a photo this good is not easy, even with my long lens.