Documentation of
Lesser Black-backed Gull
2022-006
Observer Information
Reporter:
Kristi Streiffert
223 Sierra Vista Street,
Durango,
CO 81301
E-mail:
KRISTISTREIFFERT@GMAIL.COM
Other Observers:
Robert Winslow, Katy Shirley, Lisa Wilk, Kurk HIllman
Species, Date, Time and Location Information
Species:
Lesser Black-backed Gull
First Date/Time:
4/1/2022 10:00:00 AM
Last Date/Time:
4/1/2022 11:30:00 AM
Duration (total time in view):
1 hour
County:
La Plata
Specific Location:
Pastorius State Wildlife Area
Number:
1
Age:
Adult
Sex:
Unknown
Plumage:
Breeding
Viewing Conditions
Optics:
Scope
Distance:
50 to 100 yards (photo at 50 yards)
Light:
Excellent
Description of the Bird
I was looking for a California Gull in with the regular Ring-billed Gulls. I found a gull the same size as the ring-billed, with yellow legs and red on the bill. But the back was not the gray it should be for a California. It was a lot darker. So I took a picture and found some other birders to discuss it with. They said they noticed the darker, blacker back, but that they still thought it was a California. I did not agree and asked them to send their pictures around for confirmation. We all sent pics to various people and they agreed this was a lesser black-backed gull. The photo I will attach is mine, and not very good.
But Robert Winslow will load his photos on ebird and they are make it clear. Please let me know if you need to have him send the photos directly to you or if the ebird list photos work.
Similar Species Discussion
California - wrong color back.
Western - not enough white on ends of feathers.
Resources Used
We asked JasonSt Pierre to look at Robert Winlow's photos.
My (only so-so) photo was sent to Mark Holmgren and he called it Lesser Black-backed from that photo.
I also used a Seabirds of the World book and Sibley.
Previous Experience
Not a lot, that is why I asked several others to look at the photos.
Date Documentation Submitted
4/3/2022 9:26:00 AM
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Location Map
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