| Citation | BIrdLife International, 2019 Cassin's auklet Ptychoramphus aleuticus. http://datazone.birdlife.org/species/factsheet/Cassins-auklet/distribution [Accessed: 17/05/2019]. |
| Ref. | 120304 BIrdLife International, 2019 |
| Page | |
| Named Used as Valid | Ptychoramphus aleuticus |
| Locality | |
| Distribution | Alaska, USA and Canada. |