California mammals

North Pacific Right Whale in California

Eubalaena japonica

Native to California SNR Unranked in California

Not listed as nonindigenous in California by USGS NAS; native to its California range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

EN – Endangered

Very high risk of extinction in the wild.

North Pacific Right Whale in California, by the numbers

Rare in California 226th most recorded of 241 mammals logged in California

13 occurrence records
4 with iNaturalist photos

When to look for the North Pacific Right Whale in California

Most sightings fall in March.

13 California occurrence records (iNaturalist and GBIF) by month of year. Shows when the species is recorded, not a guarantee of presence. Based on a small number of dated records; the seasonal pattern may not be representative.

Monthly California records (table)
MonthRecords
January1
February0
March7
April2
May3
June0
July0
August0
September0
October0
November0
December0

Monthly north pacific right whale occurrence records (iNaturalist and GBIF) in California.

Seasonality

Year-round in California, with recorded sightings peaking in March.

Occurrence map

Where North Pacific Right Whale has been recorded in California

13 records mapped · zoom and drag to explore

12 California records mapped

Where it's recorded in California

CountyRecords
Santa Cruz County 1
Alameda County 1
San Diego County 1
Other localities 10

The complete county distribution, spread across 3 California counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

California’s 13 open records for the North Pacific right whale represent an outsized share of one of the rarest whales anywhere, a species whose entire Northeast Pacific group may include no more than about 40 individuals total.

A wanderer far from its summer water

Almost the whole Northeast Pacific group spends summer far to the north, in the Bering Sea and the Gulf of Alaska, hundreds of miles from California’s coast. A California sighting represents a genuine outlier, most likely a whale moving through on a winter or migratory track rather than any regular seasonal visitor. March holds the largest share of the state’s records, 7 of 13, which hints at a transit window along the coast, though a sample this small can shift with a single reported sighting.

One of the most imperiled whales on the books

NatureServe ranks this species G1 globally, its highest urgency category, reserved for animals at genuine risk of disappearing rather than simply uncommon. Calves and young whales face real predation risk from orcas and large sharks, but historical whaling, not modern predation, is what reduced the Northeast Pacific group to its current size. Every documented individual matters more here than it would for almost any other marine mammal on this site.

Status in California

NatureServe hasn’t assigned a subnational rank specific to California, and the species is treated as native to the offshore waters it occasionally reaches. With so few individuals left anywhere in the Northeast Pacific, California’s 13 records aren’t a measure of local numbers so much as a record of exceptionally rare visits from one of the ocean’s most endangered whales.

Occurrence data from iNaturalist and GBIF.

More mammals in California in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries