449 Gilmae TRIBIL OF SANDPIPER Arquetella 1931 July 12, Sevonga, St. Lawrence Is., Berming Sea, Alaska - Quite common here - found on tundra, lakes, & rivers but rarely seen along the shore. Have been confused on this form. There seem to be two forms, identical except for size. One has a bill under 1 1/4" & body under 9" & the other is larger. Nelson gives the bill measurements of 2 Tribilof Sandpipers as over 1 1/4" Both kinds are formed indiscriminately with Red Backed Sandpiper. One nest contained 4 pygiform eggs of dark color & darker blotches. They have a variety of call notes which they utter from the ground or while in flight. When feeding they have a shrill call like a Flicker or Woodpecker & when on the wing have a short shrill trill. The trill resembles that of the Red Backed Sandpiper but shorter in duration. The nest was a fairly well concealed hollow in the grass.