On rocks near shoreline.
Periferia Presa Constitución 1917. Laura Uribe, Grupo Vasconcelos ITSJR
The Spotted Sandpiper (Actitis macularius syn. Actitis macularia) is a small shorebird, 18–20 cm long. Together with its sister species, the Common Sandpiper (A. hypoleucos) they make up the genus Actitis. They replace each other geographically; stray birds may settle down with breeders of the other species and hybridize.