Thayer's gull
- kingdom: Animalia
- phylum: Chordata
- class: Aves
- order: Charadriiformes
- family: Laridae
- genus: Larus
- species: Larus thayeri
Cobourg
Ontario
Canada
San Felipe
Baja California
Mexico
Dardanelle
Arkansas- Alameda
- Albany
- Arcata
- Black Point-Green Point
- Bodega Bay
- Broadmoor
- Calipatria
- Campbell
- Capitola
- Carson
- Chula Vista
- Colma
- Cottonwood
- Cypress
- Dana Point
- El Cajon
- El Cerrito
- Fort Bragg
- Freedom
- Irvine
- Kelseyville
- La Crescenta-Montrose
- La Jolla
- La Mesa
- La Mirada
- La Palma
- Laguna
- Lakeport
- Lemon Grove
- Livermore
- Los Angeles
- Malibu
- Marina del Rey
- Monterey
- Mountain View
- Opal Cliffs
- Pacific Grove
- Pacifica
- Petaluma
- Pleasanton
- Port Hueneme
- Redding
- San Diego
- San Francisco
- San Martin
- Santa Barbara
- Santa Cruz
- Santa Venetia
- Soquel
- Thousand Oaks
- Vine Hill
- Watsonville
California- Windsor
Connecticut- Bettendorf
Iowa- Murray
Kentucky- Gloucester
Massachusetts- Winfield
Missouri- North Platte
Nebraska- Carlsbad
- La Huerta
- North Valley
New Mexico- Millvale
- Pittsburgh
Pennsylvania- Fort Pierre
- Pierre
South Dakota- Humble
Texas- Artondale
- Bainbridge Island
- Battle Ground
- Bethel
- Bremerton
- Clarkston
- East Port Orchard
- Eastgate
- Edmonds
- Esperance
- Gig Harbor
- Hockinson
- Home
- Issaquah
- Lakewood
- Lewisville
- Longview
- Marysville
- Oak Harbor
- Ocean Shores
- Olympia
- Pasco
- Point Roberts
- Port Angeles
- Port Hadlock-Irondale
- Port Townsend
- Seattle
- Sequim
- South Bend
- Southworth
- Vashon
- Westport
- Woodway
Washington- Milwaukee
- Racine
- Saint Francis
- Sheboygan
- Superior
Wisconsin
United States