Oceanites gracilis
The Elliot's Storm Petrel (*Oceanites gracilis*) is a diminutive and enigmatic seabird, measuring approximately 13-16 cm in length with a wingspan of 31-34 cm and weighing a mere 22-30 grams, making it the smallest storm petrel globally. Its plumage is uniformly sooty black, strikingly contrasted by a clean white rump patch and often extensive white on the lower flanks and belly, distinguishing it from most other dark storm petrels. A key identification feature is its remarkably long, slender...
This highly pelagic species primarily inhabits offshore oceanic waters, often associating with productive, cold upwelling currents like the Humboldt Current. Breeding occurs nocturnally on remote, predator-free rocky offshore islands and coastal cliffs.
Their diet consists mainly of small crustaceans (such as copepods and amphipods), larval fish, squid, and other tiny marine invertebrates gleaned from the ocean's surface.
Elliot's Storm Petrel exhibits a fascinating dual life: it is an active diurnal forager at sea but strictly nocturnal at its breeding colonies, a strategy to evade avian predators. Foraging involves a distinctive "walking on water" or hydroplaning technique, where it patters its long feet on the ...
Elliot's Storm Petrel is endemic to the Eastern Pacific Ocean, with its distribution closely tied to the cold, nutrient-rich waters of the Humboldt Current. The nominate subspecies, *Oceanites gracilis gracilis*, breeds on numerous offshore islands and coastal cliffs along the coasts of Peru (e.g...
Near Threatened
- It is the smallest species of storm petrel in the world, a true miniature seabird weighing barely more than a golf ball. - Its extremely long legs often trail conspicuously beyond its tail in flight, a key identification feature that distinguishes it from other storm petrels. - Elliot's Storm P...