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Iceland Gull (Thayer's)

Larus glaucoides thayeri

ML132531611



eBird Checklist S22729368
Colma Creek mouth
San Mateo, California, United States
Search this location, Illustrated Checklist
Latitude and Longitude 37.6428, -122.397 Map

Age
Not specified
Sex
Not specified
Behaviors
Breeding
Tags

Comments

Observation details

Immature bird associating with a mixed flock of california and western gulls of mixed age. Paler and larger than California gulls but smaller and more delicate than the westerns; light chocolate overall with diffuse dark area around eye. Bill dark with paler area around base. Wingtips darker than general coloration of tertials and upperparts. Tertials pale brown, same color as rest of upper parts.

Technical Information

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