One of the times I went to catch some sunset shots, I passed by a tiny little beach (if it can be called a beach) on the way home. Depending on the water level, it is either completely submerged or has a thin strip of sand and stones exposed. So when the water drops, the little birds are running around looking for all kinds of little buggers hiding in the sand.
These are Ruddy Turnstones I believe. They must be nesting around as well somewhere between the rocks. There are times when dozens and dozens of them fly from one spot to another, and this is when they are the most visible. After they land, they blend so well that if they don't move, they look like nearby rocks. Great camouflage skills!
It was way after the sun hid behind the horizon, and I still caught a few of them looking for food. The last little bite before they go hide between the rocks for the night.