Verification of Unusual Sight Record
For Utah

Rec. # 2017-05

Common name:

Iceland Gull

Scientific name: Larus glaucoides
Date: 01-21-2017
Time: 16:15
Length of time observed: 10 minutes
Number: 1
Age: Juvenile
Sex: Unknown
Location: FBWMA
County: Davis
Distance to bird: 225 yards
Optical equipment: 20x60x80 Swarovski HD spotter & 15-45x65 Vortex HD spotter
Weather: Mostly cloudy.
Light Conditions: Good lighting with clearing skies at our backs.
Description:        Size of bird: ~ 21"
(Description:)       Basic Shape: Gull
(Description:)  Overall Pattern: Pale
(Description:)            Bill Type: Medium bill size, gull
Field Marks and
Identifying Characteristics:
Overall pale gull with primaries that were the same pale color as mantle, bill was black and slightly smaller than the bill of the surrounding CAGUs. Overall size was close to that of CAGUs but noticeably smaller than the Herring Gulls close by.
(see photos)
Song or call & method of delivery: N/A
Behavior: Standing at rest
Habitat: Frozen marsh
Similar species and how
were they eliminated:
Glaucous Gull- Would've been much larger with a heavier bill that was pale at base and black at tip.
Glaucous-winged Gull- Would've been larger with a heavier bill. Primaries would've been more of a pale gray than the white-ish we saw.
Thayer's Gull- would've been close in overall size and bill size/color, but would've had (at the very least) medium brown primaries.
Previous experience with
this & similar species:
Saw thousands of GLGU & GWGU in all cycles while in Nome, AK. Have seen many THGU in Northern Utah. Have only seen a few ICGU.
References consulted: Howell-Dunn Petersen Reference
Description from: From memory
Observer: Mike Hearell
Observer's address: Pleasant View, Utah
Observer's e-mail address: **
Other observers who independently identified this bird: Taylor Abbott
Date prepared: 1/22/17
Additional material: Photos
Additional comments: