Verification of Unusual
Rec. # 2007-02
Lesser Black-backed Gull
|Scientific name:||Larus fuscus|
|Length of time observed:||30 minutes|
|Location:||Lee Kay Ponds|
|Distance to bird:||50 yards|
|Optical equipment:||Bausch & Lomb Discoverer Zoom Scope|
|Weather:||Overcast, very cold, windy|
|Description: Size of bird:||Medium-sized Gull|
|(Description:) Basic Shape:||Gull-shaped|
|(Description:) Overall Pattern:||Gray and white gull pattern|
|(Description:) Bill Type:||Gull-like|
Field Marks and
Similar in size to numerous nearby California Gulls.
Bright yellow bill with red gonydeal spot.
White head with large amount of dark streaking on back of head and neck.
Dark smudgy streaking around the eye, highlighted the yellow iris of the eye.
Dark gray back and wings. Wingtips black with two small white windows visible.
Underparts and tail clear white with a few faint streaks on the front of the neck.
|Song or call & method of delivery:||Not heard|
|Behavior:||Sitting on ice, turning head back and forth. Lifted wings occasionally. Stood for about 30 seconds and then settled back down on the ice.|
|Habitat:||Ice covered pond.|
were they eliminated:
Nearby California Gulls had paler backs and wings and also did not have yellow
irises. Their streaking was also less intense around the eye.
Herring Gulls were larger, much paler on their backs and wings, and had pink legs.
Nearby Ring-billed Gulls were much smaller, obviously paler on their backs and wings and had no red on their bills--only black.
Great Black-backed Gull is larger with pink legs and does not have streaking on the head in winter.
Western Gull has pink legs, is larger, has unstreaked head in winter and a longer, thicker bill.
Yellow-footed Gull is larger and has an unstreaked head in winter.
this & similar species:
Three previous sightings of LBBG in Ireland, Texas, and at Farmington Bay
Extremely familiar with California, Ring-billed and Herring Gulls in all plumages.
Numerous sightings of Great Black-backed Gulls in Ireland, Maine, Ontario, and New Brunswick.
Numerous sightings of Western Gulls along the Pacific Coast mostly in California.
One sighting of a Yellow-footed Gull at the Salton Sea in 2003.
|References consulted:||Sibley, National Geographic|
|Description from:||Notes taken at time of sighting|
|Observer:||Kathy and Joel Beyer|
|Observer's address:||1719 Hillcrest Avenue, Salt Lake City, UT 84106|
|Observer's e-mail address:||firstname.lastname@example.org|
|Other observers who independently identified this bird:||Steve and Cindy Summerfield|
|Additional comments:||Steve and Cindy Summerfield found the bird, showed it to us, and we all agreed (one under duress) that Kathy would submit the rare bird report.|