Family Auks (Alcidae)

Near Threatened

Long-billed Murrelet (Brachyramphus perdix)


French: Guillemot à long bec German: Langschnabelalk Spanish: Mérgulo jaspeado asiático

Cepphus perdix


, 1811,

Bering Sea and Sea of Okhotsk


Until recently lumped with B. marmoratus, but differs in larger size, published data#R giving effect size for bill 3.9 (2); clear white or lightly barred white vs densely grey-and-white barred chin and throat (2); more distinctly barred upperparts in summer and winter (marmoratus greyer and unbarred in winter) (2); crown colour and pattern uniform with upperparts in summer and winter (blackish in summer and winter in marmoratus) (ns[2]); “narrow, white marginal stripe on outermost rectrix”#R (ns[1]); no bold white half-collar in winter (3). Monotypic.


Kamchatka and Sea of Okhotsk S to N Japan (Hokkaido). Winters mainly into S parts of Sea of Okhotsk and Japan.

Descriptive notes

24–26 cm; male 258–357 g; wingspan 43 cm. Overall, appears more extensively dark on head, nape, forehead, and lores (above gape), whereas formerly conspecific B.... read more


Apparently no information; whether this species’ repertoire differs from that B. marmoratus... read more


Breeds in old-growth coniferous forests within 30 km of the coast, or on rocky scree slopes, cliffs... read more

Food and feeding

No studies of this species’ diet appear to have been undertaken. Foraging behaviour is presumably similar to that of B. marmoratus... read more


Very poorly known, with approximately four tree and one ground nests reported in Russia the first as recently as 1961; all tree nests have... read more


Migratory, deserting breeding areas in Sept and Oct, moving into S parts of Sea of Okhotsk during... read more

Status and conservation

Not globally threatened. Currently considered Near Threatened. No overall population estimate, but is thought to number between 50,000 and 100,000 individuals, and to be... read more

Recommended citation

del Hoyo, J., Collar, N. & Kirwan, G.M. (2019). Long-billed Murrelet (Brachyramphus perdix). 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 17 September 2019).