Sighting Record for Utah

Common name:	White-rumped Sandpiper
Scientific name:	Calidris fuscicollis
Date:	6/16/2021
Time:	1:55 PM
Length of time observed:	5 minutes
Number:	1
Age:
Sex:
Location:	Dugway Proving Ground, English Village Sewage Lagoon
County:	Tooele
Latilong:
Elevation:
Distance to bird:	20 meters
Optical equipment:	Binoculars, 10x42. Cell phone camera.
Weather:	Clear, 100 degrees
Light Conditions:	Well lit
Description: Size of bird:	Largish peep
(Description:) Basic Shape:	Sandpiper/peep/shorebird
(Description:) Overall Pattern:	Greyish/brownish
(Description:) Bill Type:	Long/probing
(Description:) Field Marks and Identifying Characteristics:	Long winged peep with distinct streaking on breast and flanks, greyish back with some rufous mottling. Light orangish base to the bill. Did not see fly, so could not see the rump. (see photos)
Song or call & method of delivery:	Did not vocalize
Behavior:	Foraging
Habitat:	On algae mats in sewage lagoon
Similar species and how were they eliminated:	Baird's would be the most similar, more expected species. More gray than a Baird's, streakier front. Also the light base to the bill isn't seen on a Baird's.
Previous experience with this & similar species:	I've been birding for 15+ years, had multiple bird related jobs, taught ornithology lab for 4 years. Shorebirds aren't my strongpoint, but that is why I verified with other birders.
References consulted:	Sibley app, Google, Neil Paprocki, Bryant Olsen
Description from:	From photo(s) taken at the time of the sighting
Observer:	Danielle Finlayson
Observer's address:	1159 S 1450 E Provo, UT 84606
Observer's e-mail address:	**
Other observers who independently identified this bird:	Kaylee Draughon first spotted them foraging
Date prepared:	June 17, 2021
Additional material:	Photos
Additional comments:	ebird checklist, with pics: https://ebird.org/checklist/S90308152