Birds at the Seacoast

About a week ago, at the beach, I wanted to snap a couple of shots of the birds that were gliding above the water, probably looking for small fish to catch.
I didn't really know what these birds were. Looked like seagulls, but the heads are black. I did a bit of research, and it turns out these are black-headed gulls and are common to see. The heads actually turn white when they are not in a breeding season anymore, leaving only a couple of black dots. Pretty interesting.

Here are two shots that I managed to take. These are not the best photos. I didn't spend a lot of time trying to get the best photo. Taken with 200mm lens and later cropped in a bit during the post-processing.