Least Storm Petrel

Hydrobates microsoma (Coues, 1864)

20 gWeight

Busiest months: September · Most records: United States, Mexico, Costa Rica

Least Concern

Where and when it's recorded

Least Storm Petrel has been recorded at 9 of the 8,171 birding hotspots we track, in 3 countries and regions.

Records by month Northern Hemisphere

Where it's recorded most

Amado WTPUnited States17 records
Southeast Farallon IslandUnited States13 records
Patagonia Lake State ParkUnited States5 records

More places

Reserva Ecológica Estero de San José del CaboMexico4 records
Pt. Pinos – seawatch onlyUnited States4 records
PN Corcovado – Sector SirenaCosta Rica3 records
Playa YelapaMexico2 records
Rio PitillalMexico1 record
Pt. PinosUnited States1 record

Countries and regions with the most records

United States Mexico Costa Rica

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 Least Storm Petrel?

The Least Storm Petrel weighs around 20 g.

Where does the Least Storm Petrel live?

Its breeding range: Pacific Ocean: Islands de San Benito (west of central Baja California), Roca Consag, Isla San Luis, Island Partida and Island Cardonosa Este (east of northern, north-central, central Baja California, Gulf of California). It is most often recorded in United States, Mexico and Costa Rica.

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

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

Is the Least Storm Petrel endangered?

The IUCN Red List classifies the Least Storm Petrel as Least Concern.

What does the Least Storm Petrel eat?

Main food: Fish, shrimp & shellfish.

What family is the Least Storm Petrel in?

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

At a glance

Weight: 20 g
Habitat: Ocean
Diet: Fish, shrimp & shellfish
Lifestyle: Feeds in the air
Migration: Partial migrant
Conservation: Least Concern

More measurements

Wing: 119 mm
Tail: 56 mm
Bill: 12 mm
Tarsus: 22 mm

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

Range

Pacific Ocean: Islands de San Benito (west of central Baja California), Roca Consag, Isla San Luis, Island Partida and Island Cardonosa Este (east of northern, north-central, central Baja California, Gulf of California)

Breeding range, IOC World Bird List 15.2