Pluvialis squatarola. Celestún Biosphere Reserve, Yucatán, México.
Juvenile. Seen from the seawall on Lack Road.
The Grey Plover (Pluvialis squatarola), known as the Black-bellied Plover in North America, is a medium-sized plover breeding in arctic regions. It is a long-distance migrant, with a nearly worldwide coastal distribution when not breeding.