<i>Tringa semipalmata</i> Length: 13.5-16.5" <p> The Willet is a common visitor to the Bay Area in the winter. They look quite gray and drab until they take off. Then the underside of their black-and-white wings is on display. A flock of them is quite spectacular. </p> <p> Willets mainly eat aquatic insects and other invertebrates. Along the coast they also eat crabs, molluscs, and small fish. </p>