Toys on the beach

This week I stayed a few days on Terschelling; a good place to forget about all the things that kept me so busy lately, to refresh my mind, and to get new inspiration.
In winter, Sanderlings (Calidris alba/Drieteenstrandloper) are always present on the beach on the north-side of the island. Usually they run like mechanical clockwork toys along the water-line, parrying waves and picking up small animals thrown up by the sea. But sometimes they need a short rest break. They seem to sleep, but one bird kept a keen eye on me (who is that bloke crawling to us?).