
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.

Category
BirdsRarity
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
Nestless Balancing Act
Balances a single egg on a bare branch or rocky ledge without using any nesting materials.
Precision Surface Dipping
Employs a highly agile hovering flight pattern to pluck small marine life directly from the water's surface without fully submerging.
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
Tropical Two-wing Flyingfish
Exocoetus volitans
Feeds heavily on juvenile flying fish near the ocean surface.
Australian Pine
Casuarina equisetifolia
Relies on the sturdy, horizontal branches of the ironwood tree to lay its single egg.
Feral Cat
Felis catus
Invasive predators that frequently hunt the vulnerable, nestless eggs and chicks.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
Collections
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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.
Snap Map
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Recent Snaps
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Where to spot
Hawaii, US
Chinatown
You might spot Red-Crested Cardinal and Zebra Dove.
View guide โ
Hawaii, US
Foster Botanical Garden
You might spot Red-Crested Cardinal and Zebra Dove.
View guide โ

Hawaii, US
Hawaii Capital Historic District
You might spot Red-Crested Cardinal and Zebra Dove.
View guide โ
Hawaii, US
Liliuokalani Botanical Garden
You might spot Zebra Dove and Red-Crested Cardinal.
View guide โ

Hawaii, US
Lyon Arboretum
You might spot Koster's Curse and White-Rumped Shama.
View guide โ
Hawaii, US
Merchant Street Historic District
You might spot Red-Crested Cardinal and Zebra Dove.
View guide โ









