Fregata andrewsi

Overview

The Christmas frigatebird (Fregata andrewsi) is a large seabird belonging to the family Fregatidae that is endemic to Christmas Island in the Indian Ocean. It is the only frigatebird species restricted to a single island for breeding, making it unique among its relatives.

Identification

• Size: Large and lightly built, measuring 89–100 cm in length with a wingspan of 205–230 cm.
• Plumage: Adult males are predominantly brownish-black with a distinct egg-shaped white patch on the belly; females and other plumages feature whiter bellies and longer white underwing spurs compared to the lesser frigatebird.
• Structure: Possesses long, narrow wings and a deeply forked tail.
• Display: Males possess a striking red gular sac that they inflate to attract mates.

Habitat

This species is endemic to Christmas Island in the Indian Ocean, where it maintains four main nesting colonies. It is a seabird that inhabits the island and its surrounding marine environment.

Diet

The bird feeds on fish taken in flight from the ocean's surface, predominantly targeting flying fish. It also practises kleptoparasitism by harassing other birds to force them to regurgitate their food.

Did you know?

The Christmas frigatebird was formerly listed as critically endangered by the IUCN but has since been reclassified as vulnerable, though populations continue to decline due to persecution, habitat loss, and fishing gear entanglement.