| Reference no. | Keitt, B.S., B.R. Tershy and D.A. Croll, 2003 |
| Ecosystem | Temperate Northern Pacific |
| Status | native |
| Abundance | |
| Lifestage | adults |
| Regional database | |
| Remarks | Breeds in Baja California in winter from November to August, on Isla Guadalupe for 2,500 pairs, Islas San Benito for 250 to 500 pairs, and Islas Natividad for 5,000 to 10,000 pairs (Ref. 84934). C: Refs. 80115, 84934; M: Ref. 7816; O: Refs. 80115, 84934. |