Tristram's Storm-Petrel
NameTristram's Storm-Petrel
Common NameTristram's Storm-Petrel
Scientific NameHydrobates tristrami
FamilyHydrobatidae
Wingspan (cm)49.5
Length (cm)25.5
Weight (g)70
Plumage DetailsEntirely sooty-brown to dark grey plumage, often appearing uniformly dark. Some individuals may show a faint pale bar on the upperwing coverts.
Vocalization / CallGenerally silent at sea. At breeding colonies, they emit a variety of chirps, trills, and purring calls, often described as a series of 'churr-churr-churr' or 'peep-peep-peep' notes.
Primary Dietcarnivore
Primary Habitatscoastal
Conservation Statusnear-threatened
Geographic RangeBreeds on remote islands in the Northwestern Hawaiian Islands (e.g., French Frigate Shoals, Laysan, Pearl and Hermes Atoll) and the Izu Islands of Japan. Disperses widely across the North Pacific during non-breeding seasons.
Identifying Featuresuniformly dark plumage, medium size for a storm-petrel, faint pale bar on upperwing (variable), forked tail (often appears square-tipped at sea), pelagic behavior
Description
A medium-sized, dark storm-petrel of the North Pacific, spending most of its life at sea. It breeds colonially on remote oceanic islands, foraging for small marine organisms from the ocean surface.
