Verification of Unusual
Rec. # 2010-42
Kumlien's Gull (Iceland Gull)
|Scientific name:||Larus (glaucoides) kumlieni|
|Length of time observed:||~ 1.5 hours|
|Location:||Farmington Bay WMA|
|Elevation:||~ 4300 ft|
|Distance to bird:||10-25 m|
|Optical equipment:||10-60x scope|
|Weather:||clear and calm|
|Light Conditions:||direct afternoon sunlight|
|Description: Size of bird:|
|(Description:) Basic Shape:|
|(Description:) Overall Pattern:|
|(Description:) Bill Type:|
Field Marks and
There were two gulls present that I believe were first-cycle Kumlien s Gulls
(both pictured in Photo A). One slightly larger with more dusky markings in
wings and an all black bill, and the other smaller and very white overall with a
bicolored bill. Both gulls relatively small and delicately built (considerably
smaller than nearby Herring, Western, Glaucous, and Glaucous-winged Gulls).
Small rounded head and short stubby bill. Black eye. Overall very pale and
whitish with a few scattered brownish markings; fine light creamy brownish
speckling/ barring on back, coverts, wings (particularly tertials), and
uppertail coverts. Wingtips pale (same color as back and underparts) and long
(projecting well past tail). Tail white with slightly darker base to uppertail.
Undertail coverts white with fine light brown barring. Bill on one bird all
black and other smaller bird with black tip and flesh pink base. Legs fleshy
|Song or call & method of delivery:||na|
|Behavior:||foraging on dead carp, swimming, and resting on ice.|
were they eliminated:
Nominate Iceland Gull (glaucoides) - has even colored primaries vs. slightly
browner on Kumlien's. Apparently Iceland Gulls show the bicolored bill more
often than Kumlien's, but this character can overlap, particularly in late
winter (as the bill gradually becomes lighter).
Thayer's Gull and Thayer's hybrids - larger and longer-billed, with brown to light brown wingtips (blackish brown outer webs on outer primaries), dark secondary bar, darker tail, and more evenly brown tertials.
Glaucous Gull - larger and stouter overall with longer bill, thicker legs, and shorter broad wings (and shorter primary projection) with all white wingtips.
this & similar species:
|Description from:||Notes taken at time of sighting|
|Observer's address:||Hurricane, UT|
|Observer's e-mail address:|
|Other observers who independently identified this bird:||
Steve and Cindy Sommerfeld, Paul Higgins, and others reported a first-cycle
'Iceland' Gull in early February at Farmington Bay, but I'm not sure which of
these two birds was observed.
|Additional_Comments:||description copied from field notes taken while studying gulls at Farmington Bay on 02-25-09.|