Cassin's auklet
- kingdom: Animalia
- phylum: Chordata
- class: Aves
- order: Charadriiformes
- family: Alcidae
- genus: Ptychoramphus
- species: Ptychoramphus aleuticus
Campbell River- Courtenay
- Oak Bay
- Parksville
- Prince Rupert
- Tofino
- Ucluelet
- Victoria
- West End
British Columbia
Canada
Ensenada
Baja California- Bahía Asunción
Baja California Sur
Mexico
Aptos- Arcata
- Avalon
- Avila Beach
- Bodega Bay
- Bolinas
- Broadmoor
- Camarillo
- Cambria
- Capitola
- Carlsbad
- Carmel-by-the-Sea
- Channel Islands Beach
- Coronado
- Costa Mesa
- Crescent City
- Dana Point
- Del Mar
- Del Monte Forest
- El Cerrito
- El Granada
- El Segundo
- Elkhorn
- Encinitas
- Eucalyptus Hills
- Fort Bragg
- Grover Beach
- Half Moon Bay
- Hermosa Beach
- Highlands-Baywood Park
- Huntington Beach
- Isla Vista
- La Jolla
- La Selva Beach
- Laguna Beach
- Live Oak
- Long Beach
- Malibu
- Malibu Beach
- Manhattan Beach
- Marina del Rey
- Mission Canyon
- Montara
- Monterey
- Morro Bay
- Moss Beach
- Newport Beach
- Oceanside
- Opal Cliffs
- Pacific Grove
- Pacifica
- Pajaro
- Pismo Beach
- Port Hueneme
- Rancho Palos Verdes
- Redondo Beach
- Rio Del Mar
- San Clemente
- San Diego
- San Francisco
- San Pedro
- Santa Barbara
- Santa Cruz
- Santa Monica
- Sausalito
- Seacliff
- Seal Beach
- Seaside
- Solana Beach
- Soquel
- Toro Canyon
- Torrance
- Twin Lakes
- Watsonville
- Westhaven-Moonstone
California
United States