The first one: I like the feel, the composition needs some help though. A simple recropping should do. I'd crop off the left 25% and bottom 15%. Clone out the wing tips at top right. The exposure and feel is ok.
The Second one: Nice and sharp,Nice exposure. Not a lot happening, just a close up of a gull. However the reflection is nice, maybe a little too much space above, unless you are submitting to publisher where copy would fill that area.
The third one: The bottom plover should be separated a little more from the out-of-focus plover so that the head doesn't conflict with the reflection. Could be a little brighter.
I noticed you turned off the image editing option for others to show you there ideas. You can enable it in your profile settings if you wish.
Thanks for sharing your images with us.