Ashy Storm Petrel

Hydrobates homochroa (Coues, 1864)

37 gWeight

Busiest months: September–October · Most records: United States

Endangered

Where and when it's recorded

Ashy Storm Petrel has been recorded at 9 of the 8,171 birding hotspots we track, in 1 country or region.

Records by month Northern Hemisphere

Where it's recorded most

Southeast Farallon IslandUnited States3,458 records
Pt. Pinos – seawatch onlyUnited States254 records
Pt. PinosUnited States17 records

More places

Hayward Regional ShorelineUnited States5 records
Bodega Bay – harbor and immediate vicinityUnited States2 records
Rodeo LagoonUnited States2 records
Pt. Reyes – Abbotts LagoonUnited States1 record
Ventura Settling PondsUnited States1 record
Pillar Point HarborUnited States1 record

Countries and regions with the most records

United States

eBird records via GBIF up to 2024-12-31. A record means someone listed it; more records partly mean more birders, not more birds.

Questions

How big is the Ashy Storm Petrel?

The Ashy Storm Petrel weighs around 37 g.

Where does the Ashy Storm Petrel live?

Its breeding range: Pacific Ocean: islands of Van Damme Cove (Mendocino County); Bird Rock (Point Reyes), and Farallon Islands (west of central California); Channel Islands (west of southern California); Coronado Islands and Island de Todos Santos (west of northwestern Baja California, northwestern Mexico). It is most often recorded in United States.

When is the best time to see the Ashy Storm Petrel?

At the hotspots we track, it is recorded most in September and October (Northern Hemisphere).

Is the Ashy Storm Petrel endangered?

The IUCN Red List classifies the Ashy Storm Petrel as Endangered.

What does the Ashy Storm Petrel eat?

Main food: Fish, shrimp & shellfish.

What family is the Ashy Storm Petrel in?

It belongs to the family Northern Storm Petrels (Hydrobatidae), order Procellariiformes.

At a glance

Weight: 37 g
Habitat: Ocean
Diet: Fish, shrimp & shellfish
Lifestyle: Feeds in the air
Migration: Migratory
Conservation: Endangered

More measurements

Wing: 133 mm
Tail: 72 mm
Bill: 17 mm
Tarsus: 21 mm

Averages from the AVONET dataset; length from field guides where available.

Range

Pacific Ocean: islands of Van Damme Cove (Mendocino County); Bird Rock (Point Reyes), and Farallon Islands (west of central California); Channel Islands (west of southern California); Coronado Islands and Island de Todos Santos (west of northwestern Baja California, northwestern Mexico)

Breeding range, IOC World Bird List 15.2