Verification of Unusual
Rec. # 2019-15
|Scientific name:||Toxostoma curvirostre|
|Length of time observed:||5 minutes|
|Location:||Grand Staircase Inn, Cannonville|
|Distance to bird:||75 yards|
|Optical equipment:||Pentax ED 8x 43 binos, Canon 60D dslr with 100-400 IS lens|
|Weather:||Sunny and warm, Calm winds|
|Light Conditions:||Clear and bright|
|Description: Size of bird:||N/A|
|(Description:) Basic Shape:||N/A|
|(Description:) Overall Pattern:||N/A|
|(Description:) Bill Type:||N/A|
Field Marks and
|I never viewed the bird.|
|Song or call & method of delivery:||
Gave wit-weet call continuously for about 5 minutes with anywhere
from 10-30 seconds between calls. Was hidden in a shrub the entire time.
Spectrogram comparisons between the call note of my bird and other Curve-billed
Thrashers in nearly identical, but individual birds can have slight variations
to their calls notes.
|Behavior:||I never got a look at the thrasher. It was calling in a shrub in an adjacent yard to the hotel. It gave the distinctive wit-weet of western Curve-billed Thrasher.|
|Habitat:||Residential area with large open yards and various large shrubs and trees.|
were they eliminated:
No other species gives a call like the wit-weet of
the western Curve-billed Thrasher.
Mockingbirds could possibly mimic the call but the call was never quickly repeated and there were no interspersed calls like would be expected with a mockingbird, just the wit-weet.
this & similar species:
|I have seen and heard dozens in Arizona.|
|References consulted:||Peterson Field Guide to Bird Sounds of Western NA, Sibley Guide to Birds, Dunne's Essential Field Guide Companion|
|Description from:||Notes taken at the time of the sighting|
|Observer's address:||4609 S Wallace Ln Holladay, UT 84117|
|Observer's e-mail address:||**|
|Other observers who independently identified this bird:||N/A|
My ebird checklist with recordings of the calls can be found here:
https://ebird.org/view/checklist/S56996378. The checklist also has
pictures of the spectrogram from both my bird and another Curve-billed
Thrasher that show how close the spectrograms are.
The Peterson companion website has many other examples of the wit-weet of the western Curve-billed Thrasher and can be found here: