Least Storm Petrel

The least storm petrel, known scientifically as Hydrobates microsoma, is a diminutive seabird belonging to the family Hydrobatidae. Measuring a mere 13 to 15 centimeters in length and boasting a wingspan of approximately 32 centimeters, it holds the distinction of being the smallest member of the Procellariiformes order.

Identification Tips

This species can be recognized by its compact size and relatively uniform dark plumage. When observed in flight, one may note its rapid wingbeats and its propensity to skim the ocean's surface.

Habitat

The least storm petrel selects rocky crevices or soft earth burrows on islands for its nesting sites, where it can shuffle to and from its burrow due to its limited walking ability.

Distribution

Breeding colonies of this species are found off the Baja Peninsula and in the Gulf of California in Mexico. After the breeding season, these birds disperse widely, traveling as far south as the tropical Pacific regions of South America and are frequently observed well offshore of southern California during the late summer and autumn months.

Behaviour

The least storm petrel exhibits colonial nesting habits. At sea, it is often seen flying close to the water's surface, engaging in its characteristic feeding behavior.

Diet and Feeding

Mainly feeding on planktonic crustaceans, the least storm petrel shows a particular fondness for the larvae of spiny lobsters. It feeds by picking food items off the water's surface while in flight, a common feeding method among storm petrels.

Conservation status

Currently, the least storm petrel is classified as Least Concern by the IUCN. However, it does face threats on some breeding islands, particularly from predation by feral cats and rats.