One of the world’s rarest and most mysterious seabirds — a shadowy figure of the night skies over the Indian Ocean. Endemic to the volcanic island of Réunion, east of Madagascar, this elusive petrel belongs to the genus Pseudobulweria, a group of secretive, deep-ocean wanderers. For decades, the Mascarene petrel was thought possibly extinct, known only from a handful of 19th-century specimens and sporadic at-sea sightings. Its dramatic reappearance in recent years has not only rekindled hope for the species but also highlighted the fragile magic of oceanic birds that live almost entirely beyond human reach.

This medium-sized petrel is elegant but understated — cloaked in sooty black plumage, with long, narrow wings and a slender, hooked bill adapted for snatching prey from the ocean surface. It glides low over the waves, rising and dipping gracefully in rhythm with the sea, and at night returns to the high, forested slopes of Réunion to breed. Like its relatives, it feeds mainly on small fish, squid, and planktonic crustaceans, using its sharp eyesight and keen sense of smell to locate prey far offshore. Rarely seen in daylight, the Mascarene petrel is most active after dark, when it approaches its nesting grounds under the cover of night, calling softly as it navigates the rugged volcanic terrain.

The rediscovery of live individuals in the early 2000s was one of ornithology’s great surprises. Conservationists confirmed that the species still breeds on Réunion’s mountainous interior, in steep ravines and forested cliffs accessible only by rope or helicopter. Unfortunately, its numbers are perilously low — estimates suggest fewer than 100 breeding pairs remain. The main threats to its survival are introduced predators such as rats and cats, light pollution that disorients nocturnal flyers, and habitat disturbance caused by human development. Many young birds die each year after becoming disoriented by artificial lights and colliding with buildings, roads, or power lines on their way to the sea.

Distribution

Country

Population est.

Status

Year

Comments

Mauritius

Official estimate

EX

Extinct locally

Réunion

100-200

Official estimate

CR

2018

Breeding