ExploreBirds

Blue-Billed White-Tern

gygis candida

The Blue-Billed White-Tern (Gygis candida), more commonly known as the White Tern or Fairy Tern, is an ethereal, pure white seabird found across the tropical oceans of the world. Known for its strikingly delicate appearance and exceptionally large dark eyes, this avian marvel brings a touch of magic to the coastal and island environments it inhabits. What truly sets this species apart is its remarkable and unusual breeding behavior: instead of constructing a nest, the female delicately balances a single egg on the bare crook of a tree branch or a narrow rocky ledge. This daring strategy requires chicks to hatch with specialized, highly developed feet that immediately grip the bark to prevent them from falling. Often spotted hovering gracefully over the sparkling ocean surface, these terns are agile hunters, swooping down to pluck small fish and squid from the water. With its friendly demeanor, striking blue-based beak, and seemingly gravity-defying nesting habits, the Blue-Billed White-Tern is a highly sought-after sight for birdwatchers exploring tropical island paradises.

Habitat: Found on tropical islands and coral atolls, often on the bare branches of coastal trees.

Appearance

This small, elegant seabird is instantly recognizable by its immaculate, entirely snow-white plumage which contrasts sharply with its large, dark, expressive eyes and black eye-rings. It features a long, sharply pointed black bill that distinctly shifts to a striking cobalt blue at the base. Measuring between 28 and 33 centimeters in length with a wingspan stretching 66 to 78 centimeters, it has a slender, aerodynamic build. Its legs and feet are dark, equipped with pale yellowish or bluish webbing, and its tail is moderately forked, enhancing its agile, fluttering flight silhouette against the bright tropical sky.

KingdomAnimaliaPhylumChordataClassAvesOrderCharadriiformesFamilyLaridaeGenusGygis
Blue-Billed White-Tern
Blue-Billed White-Tern

Category

Birds

Rarity

Common

Danger

1/5 ยท Very low

Snaps

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Interesting facts

Adults can carry several small fish crosswise in their bills at the same time to bring back to their chicks.

Because they do not build a nest, they avoid nest-dwelling parasites like mites and bird fleas that plague other seabird species.

It is the official bird of Honolulu, Hawaii, where it is locally known as the Manu-o-Ku and can be seen nesting in city street trees.

Unlike almost all other birds, the Blue-Billed White-Tern builds absolutely no nest, instead laying its single egg directly in the precarious fork of a bare branch.

Special abilities

Ability

Nestless Balancing Act

Balances a single egg on a bare branch or rocky ledge without using any nesting materials.

Ability

Precision Surface Dipping

Employs a highly agile hovering flight pattern to pluck small marine life directly from the water's surface without fully submerging.

Ability

Infant Arboreal Grip

Chicks hatch with extraordinarily strong, specialized feet and claws that allow them to tightly grip bare branches immediately upon hatching, preventing deadly falls.

Measurements & details

Length
28-33 cm
Wingspan
66-78 cm
Weight
0.1-0.14 kg
Lifespan
15-42 years
Top Speed
45 km/h
Clutch Size
1
Incubation
35-36 days

Diet & Feeding

It is primarily a piscivore, sustaining itself on small marine fish and cephalopods caught near the ocean's surface.

Age differences: Chicks are fed regurgitated whole small fish by their parents until they fledge; adults forage independently.

Primary Foods

  • Flying fish
  • Small squid
  • Sprats
  • Lanternfish

Foraging Method

  • Surface Dipping

Ecological connections

hunts

Tropical Two-wing Flyingfish

Exocoetus volitans

Feeds heavily on juvenile flying fish near the ocean surface.

host plant

Australian Pine

Casuarina equisetifolia

Relies on the sturdy, horizontal branches of the ironwood tree to lay its single egg.

eaten by

Feral Cat

Felis catus

Invasive predators that frequently hunt the vulnerable, nestless eggs and chicks.

Traits

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Also known as

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Safety

Danger

1/5 ยท Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Blue-Billed White-Tern?

The easiest way to identify Blue-Billed White-Tern is to use the Snappit nature identifier app.

How long is Blue-Billed White-Tern?

28-33 cm

What is Blue-Billed White-Tern's wingspan?

66-78 cm

How much does Blue-Billed White-Tern weigh?

0.1-0.14 kg

How long does Blue-Billed White-Tern live?

15-42 years

How fast can Blue-Billed White-Tern move?

45 km/h

What does Blue-Billed White-Tern eat?

It is primarily a piscivore, sustaining itself on small marine fish and cephalopods caught near the ocean's surface.

Where is Blue-Billed White-Tern usually found?

Found on tropical islands and coral atolls, often on the bare branches of coastal trees.

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