Just northwest of Lincoln, Nebraska, Joel Jorgensen found an adult, ABA Code-3 Ross’s Gull (Rhodostethia rosea) at Branched Oak Lake on the late afternoon of 3 December while in the early P.M. Mark Brogie reported the Lake Yankton, Nebraska, Ross’s Gull was still present. The Ross’s Gull in Colorado has not been seen since 26 November, the day the Lake Yankton bird was discovered.
If accepted, the two Ross’s Gulls in Nebraska would represent the second and third records for Nebraska and the Denver, CO, Ross’s Gull, if accepted, would also be the third CO record (one likely adult was rejected by the Colorado Birds Records Committee recently).
Questions have been asked about why these three adult Ross's Gulls still have a rosy blush to their breasts, seen best on cloudy days. The pink coloration is a result of the diet of this species, similar to the pink resulting from the diet of Franklin’s Gull, Roseate Spoonbill, and some species of flamingos.
Ross’s Gull was named for the British arctic explorer, James Clark Ross, who collected the type specimen of this species in the Melville Peninsula in the Canadian arctic in June 1823 (The Audubon Society Encyclopedia of North American Birds, Terres).