IUCN Red List Assessment
Red List Category Year Assessed
Critically Endangered Red List Criteria
Reilly, S.B., Bannister, J.L., Best, P.B., Brown, M., Brownell Jr., R.L., Butterworth, D.S., Clapham, P.J., Cooke, J., Donovan, G.P., Urbán, J. & Zerbini, A.N. Reviewer/s
Taylor, B.L. & Notarbartolo di Sciara, G. (Cetacean Red List Authority) Contributor/s Justification
Although no estimate of abundance exists for right whales in the eastern North Pacific, the paucity of sightings make it very probable that the mature subpopulation size is below 50 individuals. In addition there is concern about the paucity of sightings of calves.