Japanese Murrelet Synthliboramphus wumizusume

Family: Alcidae (Auks)

Authority: (Temminck, 1835)

Red List Category

Criteria: C2a(ii)

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Justification of Red List category
This species has a small population which is thought to be declining rapidly as a result of disturbance at breeding sites, predation and mortality from drift-net fisheries. It is therefore listed as Vulnerable.

Population size: 5200-9400 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 1,310,000 km2

Country endemic: no

Land-mass type - shelf island
Land-mass type - oceanic island
Realm - Palearctic
IUCN Ecosystem -- Marine biome

Recommended citation
BirdLife International (2023) Species factsheet: Synthliboramphus wumizusume. Downloaded from on 08/12/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 08/12/2023.