Tringa semipalmata inornata (Western willet)

The willet (Tringa semipalmata), formerly in the monotypic genus Catoptrophorus as Catoptrophorus semipalmatus, is a large shorebird in the family Scolopacidae. It is a relatively large and robust sandpiper, and is the largest of the species called “shanks” in the genus Tringa. Its closest relative is the lesser yellowlegs, a much smaller bird with a very different appearance apart from the fine, clear, and dense pattern of the neck, which both species show in breeding plumage….

— Wikipedia