Family Auks (Alcidae)


Craveri's Murrelet (Synthliboramphus craveri)


French: Guillemot de Craveri German: Craverialk Spanish: Mérgulo californiano alioscuro

Uria Craveri


, 1865,

Raza Island, Gulf of California


Sometimes placed in Brachyramphus or in Endomychura. May be conspecific with S. hypoleucus, but no evidence of hybridization in zone of possible overlap (San Benito Is), and recent work shows them to be genetically distinct#R. Monotypic.


Numerous islands in Gulf of California (N to San Jorge), and islands along Pacific coast of Baja California (Cedros, Asunción–San Roque, and possibly San Martín and San Benito)#R. Winters at sea in Gulf of California and along coasts N to S California (Monterey Bay) and S to W Mexico (Nayarit).

Descriptive notes

c. 21 cm; 128–149 g. Small alcid with short, slender black bill; brownish-black upperparts, with black cap extending to bottom edge of lower mandible; white throat and... read more


High trilling whistles, sometimes loud and of high intensity, and audible up to 18 m away.... read more


Offshore and along sea coasts; has southernmost and most restricted range of any alcid, and... read more

Food and feeding

Studies lacking, but limited collections during nesting period and early post-breeding dispersal indicate mainly small-sized larval fish (... read more


Appears in waters off breeding sites in late Dec and Jan, occupying sites early Feb; peak laying second half of Feb and early Mar, but... read more


Post-breeding dispersal begins Jun–Jul; most birds remain within overall breeding range, with... read more

Status and conservation

VULNERABLE. Previously considered Near Threatened. In Mexico, formerly treated as threatened, but now considered Endangered. Total population estimated at 6000–10,000... read more

Recommended citation

Nettleship, D.N. & Kirwan, G.M. (2018). Craveri's Murrelet (Synthliboramphus craveri). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 16 October 2018).