Verification of Unusual
Sight Record
For Utah
Rec. # 2020-59
Common name: |
Brown Thrasher |
Scientific name: | Toxostoma rufum |
Date: | 9-24-2020 |
Time: | 7:15am |
Length of time observed: | 3 hours |
Number: | 1 |
Age: | Unknown |
Sex: | Unknown |
Location: | Buffalo Ranch Pond, Farmington, Utah |
County: | Davis |
Latilong: | 40.986790, -111.938963 |
Elevation: | Approx 4226ft |
Distance to bird: | 10-20 feet |
Optical equipment: | Nikon Monarch 5 Binoculars and Nikon 7200 camera with 200mm lens |
Weather: | Sunny, clear |
Light Conditions: | Sunrise lighting was dim, but turning bright. |
Description: Size of bird: | Length approximately 10 inches |
(Description:) Basic Shape: | Thrasher shape, long tail. |
(Description:) Overall Pattern: | Reddish brown |
(Description:) Bill Type: | Long slightly curved bill |
(Description:)
Field Marks and Identifying Characteristics: |
Identified the Brown thrasher almost immediately at around 7:15am, but spent
over 3 hours trying to photograph it. The larger size, compared to the more
common, yet smaller Sage thrasher, and reddish-brown color were noticeable field
markers. The thrasher was constantly flying in the opposite direction. However,
when I saw its frontal view, heavy dark streaking on whitish underparts, it
confirmed my first impression that I was on the correct track. I also sent
photos to Kenny Frisch to get a second opinion before posting the observation on
eBird. (see photos) |
Song or call & method of delivery: | Recorded smack call on RecForge App. |
Behavior: | The thrasher was elusive, disappearing into the phragmites and reappearing at different places. |
Habitat: | Marsh, some cattail, but mostly phragmites. |
Similar
species and
how were they eliminated: |
Sage and Bendire's Thrashers have smaller bodies and bills and have grayer overall color. The Long-billed Thrasher is darker and has a gray face, and is a resident non-migrant, limited to Eastern Mexico and Southern Texas. The Curve-billed Thrasher plumage is mostly gray. While Curve-billed Thrashers have been reported in Southern Utah, the likelihood of being observed in Northern Utah would be an astonishingly rare event. In contrast, the Brown Thrasher has been observed in Salt Lake County. For these reasons, as well as photographic and audio evidence, other similar species can therefore be reasonably eliminated. |
Previous
experience with this & similar species: |
From 1989 to 2010, I lived in New Hampshire, Massachusetts, Eastern Texas, North Carolina, and Virginia. I am familiar with The Brown Thrasher within its expected range. |
References consulted: | Merlin app, National Geographic Complete Birds of North America, Peterson Field Guide to Bird Sounds (https://academy.allaboutbirds.org/peterson-field-guide-to-bird-sounds/) |
Description from: |
Notes taken at the time of the sighting From photo(s) taken at the time of the sighting |
Observer: | Colin Maguire |
Observer's address: | 1262 North Nola Circle, Centerville, Utah 84014 |
Observer's e-mail address: | ** |
Other observers who independently identified this bird: | |
Date prepared: | 10-20-20 |
Additional material: | Photos wav files |
Additional comments: |