Christmas Island frigatebird

Cannot swim or land on water because their feathers are not waterproof

Kristi

Cannot swim or land on water because their feathers are not waterproof

Population 3,600 – 7,200
20-25% decline over the last three generations

A rare and spectacular seabird found only on Christmas Island in the Indian Ocean. As an island-endemic species, it has one of the smallest breeding ranges of any seabird, making it both unique and vulnerable. Built almost entirely for life in the air, this frigatebird has an enormous wingspan, long pointed wings, and a deeply forked tail that gives it exceptional control while soaring. It spends most of its life flying above the ocean, using rising air currents to remain aloft with little effort.

In appearance, the Christmas Island frigatebird is sleek and dramatic. Adult males are entirely black except for a bright red throat pouch, which they inflate like a balloon during the breeding season to attract females. This striking display is one of the most eye-catching courtship behaviors among seabirds. Females are slightly larger and have a white eye ring and pale chest markings, giving them a more patterned look. Young birds look very different from adults, with white heads and lighter bodies, and they take several years to fully mature.

What truly sets this species apart is its extraordinary flying ability. The Christmas Island frigatebird has lightweight bones and long wings that allow it to remain airborne for days or even weeks. Unlike many seabirds, it cannot land on water because its feathers are not waterproof. Instead, it feeds by snatching fish or squid from the ocean’s surface while flying. It is also famous for stealing food from other birds in midair, chasing them until they drop their catch. This clever and aggressive feeding strategy allows it to thrive without diving or swimming.

Distribution

Country
Population est.
Status
Year
Comments
Australia
2021
Non-Breeding
Brunei
2021
Cambodia
2021
Non-Breeding
China
2021
Christmas Island
2021
Breeding
Cocos Is. (Keeling)
2021
Non-Breeding
East Timor
2021
Hong Kong
2021
India
2021
Vagrant
Indonesia
2021
Japan
2021
Non-Breeding
Malaysia
2021
Philippines
2021
Non-Breeding
Singapore
2021
Non-Breeding
Sri Lanka
2021
Thailand
2021
Vietnam
2021
Non-Breeding

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Terrestrial / Aquatic

Altricial / Precocial

Polygamous / Monogamous

Dimorphic (size) / Monomorphic

Active: Diurnal / Nocturnal

Social behavior: Solitary / Pack / Flock

Diet: Carnivore / Herbivore / Omnivore / Piscivorous / Insectivore

Migratory: Yes / No

Domesticated: Yes / No

Dangerous: Yes / No