https://www.audubon.org/field-guide/bird/white-rumped-sandpiper
White-rumped Sandpiper | Audubon Field Guide
The trademark white rump patch is usually hidden by the long wings, which are a clue to this bird's long migrations. Many fly annually from Canada's Arctic...
white rumped sandpiperaudubonfieldguide
https://www.pbase.com/cristianjensen/image/60964272
White-rumped Sandpiper - Calidris fuscicollis - Illa de Riu/Serrallo, Ebro Delta - 28th May 2006...
white rumped sandpiper