Verification of Unusual
Rec. # 2011-01a
|Scientific name:||Larus glaucoides|
|Length of time observed:||20 minutes|
|Location:||Just off the frontage road that parallels I-80 in Salt Lake City. Near the ISSR.|
|Distance to bird:||75 m|
Brunton Eterna 20-60x spotting scope. Vortex Stokes 8x42 binos
|Description: Size of bird:||Slightly bigger than the Californa gulls surrounding it. 22"|
|(Description:) Basic Shape:||Medium sized gull with rounded head and petite bill.|
|(Description:) Overall Pattern:||white/mottled|
|(Description:) Bill Type:||petite & all dark|
Field Marks and
This, I believe is the same gull I reported on 1/8/11. Today's gull was 5.3
miles down the road from where I observed the gull on 1/8. Both gulls looked the
same. I now have pictures & thought I should write up a new report with the
pictures. However, my descriptions are the same.
This was a small, very pale gull with brown mottling on the wings, scaps and somewhat on the chest. If you looked at it with the naked eye, you'd almost think this was a completely white bird. The primaries of the bird were almost purely white. The bird had a completely dark and smaller bill. The size of the bird was that of a California Gull & I compared its size with nearby California Gulls, Herring Gulls, and Ring-Billed Gulls. The structure of the bird reminded me more of a Ring-Billed gull than anything else; it was a smaller, weaker looking gull. This bird immediately struck me as something that I had never seen before.
|Song or call & method of delivery:||n/a|
|Behavior:||Standing and resting.|
were they eliminated:
1st Cycle Glacous Gull- Smaller sized that Glacous. We had a Glacous fly in
about an hour later & noted the size difference. The Glacous dwarfed the
California Gulls when we saw it, and the Iceland was about the same size. Also,
the bill was smaller than that of a Glacous & was purely black.
1st Cycle Kumlien's Gull- Lighter upperparts that Kumlien's, and the wingtips had no brown or coloration compared to Kumlien's. Also, the bill was completely dark compared to bicoloration of a 1st cycle Kumlien's.
1st Cycle Glacous-Winged Gull- This bird didn't have the grayish overall that a 1st cycle Glacous-Winged Gull has. Bill was smaller and less stout. Bird was smaller than Glacous Winged Gull.
this & similar species:
|Previously viewed ICGU on 1/08/2011.|
|References consulted:||Howell/Dunn Gulls of the Americas. Sibley|
|Description from:||From memory|
|Observer's address:||857 Simpson Ave|
|Observer's e-mail address:||firstname.lastname@example.org|
|Other observers who independently identified this bird:||
Jeff Bilsky, Ryan O'Donnell, Craig Fosdick, Tim Avery, Mark Mossing, Steve and
Cindy Sommerfield, David Wheeler, & others on the GSLA trip this morning.