If you take a walk down Coast Guard Beach, you will see most of the upper beach to the right is cordoned off with stakes and string to keep the public off of that area. (Click on blog link for other photo.)
Within the area you can see little cages that have been put over the nesting Piping Plovers so that a predator cannot reach the eggs or the chicks. The birds can easily get in and out.
We are so lucky that these precious little Piping Plovers come back every year to nest on Coast Guard Beach!