Verification of Unusual Sight Record
For Utah

Rec. # 2023-36

Common name:

Rivoli's Hummingbird

Scientific name: Eugenes fulgens
Date: 6/17/2023
Time: 09:54
Length of time observed: 3 minutes
Number: 1
Age: Adult
Sex: Female
Location: Lytle Ranch Preserve
County: Washington
Latilong: 37.151035, -114.018518
Elevation: 3100
Distance to bird: About 5 meters
Optical equipment: Nikon Coolpix p900, Vortex Diamondback 10x42 binos
Weather: 90 F, still
Light Conditions: Sunny
Description:        Size of bird: Small, but large for hummingbird
(Description:)       Basic Shape: Long wings, short broad tail, tall posture
(Description:)  Overall Pattern: Green above, grayish white below, black tail with white tip, white mark behind eye
(Description:)            Bill Type: Long, thin, straight.
Field Marks and
Identifying Characteristics:
This was a very large hummingbird, which is why I noticed it. I have never seen one so large except in the tropics in Mexico. She was large, long, and lanky. There was no mistaking her for a male or for a female of a more common species like Costa's because she was huge. She also had a very distinctive white mark behind her eye, kind of shaped like a comma.
(see photos)
Song or call & method of delivery: No calls heard.
Behavior: She perched on a branch near where I was sitting and stayed there for several minutes before flying away uphill.
Habitat: Dry, scrubby copse of trees near a drying out pond in the Mojave Desert.
Similar species and how
were they eliminated:
Similar to Black-chinned hummingbird but just way too big. The bill and wings were also longer proportionally.
Previous experience with
this & similar species:
I have never seen this species before.
References consulted: eBird, Merlin, Birds of the World, and a friend who is a bird guide in the Southwest and tropics.
Description from: From memory
From photo(s) taken at the time of the sighting
Observer: Jessica Matyas
Observer's address: 375 Wall St, Salt Lake City, UT 84103
Observer's e-mail address: **
Other observers who independently identified this bird:  
Date prepared: 7/28/2023
Additional material: Photos
Additional comments: My photos of this bird are attached to the eBird checklist and I will email them in as well.