Sighting Record for Utah

Common name:	Magnolia Warbler
Scientific name:	Setophaga magnolia
Date:	May 12, 2020
Time:	9:24 am
Length of time observed:	30 minutes
Number:	1
Age:
Sex:	Female
Location:	Birch Creek
County:
Latilong:	38.4403952, -111.9463978
Elevation:	~7,000 feet
Distance to bird:	20 feet
Optical equipment:	Swarovski SLC 10x42 binoculars. Nikon P900 camera.
Weather:	Clear skies. 60's. Calm.
Light Conditions:	Clear skies.
Description: Size of bird:	Small-Medium
(Description:) Basic Shape:	Warbler
(Description:) Overall Pattern:	Yellow, black, gray
(Description:) Bill Type:	All purpose
(Description:) Field Marks and Identifying Characteristics:	Warbler with a yellow belly, chest, and throat that had black streaked flanks and a "necklace". Gray head with a black mask. Olive back with some dark spots. 2 narrow white wing bars on a dark wing. White under-tail coverts. Long, black tipped tail. Continuously watched the bird for about 30 minutes. Kept company with a Wilson's Warbler. Stayed in the same 30-40 foot section of riverside trees and brush the entire time. Even stopped for a quick bath in the stream for a minute or two. (see photos)
Song or call & method of delivery:	Did not vocalize.
Behavior:	Foraging and flitting about in general warbler-like fashion.
Habitat:	Riparian. Willows, cottonwoods, riverside brush.
Similar species and how were they eliminated:	I immediately knew and recognized the species as a Magnolia Warbler on my first look and did not need to truly "eliminate" other species. The color configuration of a yellow belly, chest, and throat with black streaks on flanks and partial black "necklace", along with the black mask, and white under-tail coverts on a black tipped tail were obvious. Gray head. Olive back. Expected species such as Yellow-rumped, Grace's, or possibly a Townsend's were eliminated by simple familiarity with those species. The field marks described above rule out these species. Yellow-rumped have numerous variations and color schemes that could appear similar to a Magnolia at times, but not all of them together. No constant yellow from the throat all the way down. No mask or necklace. A Grace's has a white belly, no olive in the back, no black mask or necklace. A Townsend's would NOT have a gray head, although they have the black streaks on their flanks, not quite a "necklace" of streaks on their neck, as well as black on their face that could appear as a "mask". Equally and potentially more rare species for Utah would be Blackburnian, Black-throated Green, Kirtland's, Prairie, Yellow-throated, Canada, Cape May, or Chestnut sided. Once again, the above mentioned field marks rule these species out as well.
Previous experience with this & similar species:	I have seen this species in at least a dozen other states and countries at multiple different times of the year. I knew it immediately.
References consulted:	I use Sibley's and ibird on my phone most of the time.
Description from:	From memory From photo(s) taken at the time of the sighting
Observer:	Steve Clark
Observer's address:	1045 S 1700 W Apt 623, Payson, UT, 84651
Observer's e-mail address:	**
Other observers who independently identified this bird:
Date prepared:	May 22, 2020
Additional material:	Photos
Additional comments:	eBird checklist with photos https://ebird.org/checklist/S68944993