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  3. Masked Booby

One of the 7 boobies on WAnimals

Masked Booby (Sula dactylatra)

Birds · Suliformes · Sulidae

Masked Booby

Sula dactylatra

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

The masked booby is the largest of the boobies, white with black flight feathers and tail and a dark facial mask around the yellow bill. It breeds on tropical oceanic islands worldwide and fishes by plunging from a great height. Like the Nazca booby, from which it was split as a separate species, it lays two eggs and always loses one to obligate siblicide by the elder chick.

Weight

1.2 kg – 2.2 kg

Size

74 cm – 91 cm

Life expectancy

25 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Diurnal

Active mainly during the day.

Social structure

Colony

Lives in large concentrations, often for breeding reasons.

OceanIslands
68countries6parks8same family

AI-generated images: illustrations, not photographs.

Fun facts

  • It lays two eggs several days apart and the elder chick always pushes the younger out of the nest within the first few days: the second egg works as insurance in case the first fails, and in more than ninety per cent of cases that insurance dies.
  • It plunges from more than twenty metres and enters the water at high speed: air sacs beneath the skin cushion the impact and its nostrils are closed off internally.
  • It breeds on remote islands throughout the tropical oceans, and the populations are so isolated that several are being studied as possible separate species.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (bird)
Habitat and environment
Tropical oceanic waters of every ocean; it breeds on predator-free islands and atolls
Sexual maturity
4 years
Gestation / incubation
43 days
Litter / clutch size
1.5 (average)

Sources consulted: Wikipedia (es): Sula dactylatra

Where to find it

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Where to see it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Masked Booby — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family

Related guides

Keep exploring

Based on what we already know about masked booby.

Share an experience, a fun fact or a tip for seeing the masked booby.
See full glossary
This page in other languages: Español · Deutsch · Français · Português · Italiano

The pins mark the parks where its presence is documented.

See its range on the interactive map→
Revillagigedo ArchipelagoMexico
Rapa NuiChile
Fernando de NoronhaBrazil
Norfolk IslandAustralia
MachalillaEcuador
Dry TortugasUnited States
Brown BoobyLeast Concern

Brown Booby

Sula leucogaster

Red-footed BoobyLeast Concern

Red-footed Booby

Sula sula

Blue-footed BoobyLeast Concern

Blue-footed Booby

Sula nebouxii

Nazca BoobyLeast Concern

Nazca Booby

Sula granti

Peruvian BoobyLeast Concern

Peruvian Booby

Sula variegata

Northern GannetLeast Concern

Northern Gannet

Morus bassanus

Where to see Masked Booby6 places
CountriesAustralia
ParksRevillagigedo ArchipelagoMexico
TagsCarnivore
Carnivore
Diurnal
Colonial
Bird
Ocean
Islands

North America32

Oceania20

Africa9

South America6

Asia1

Australia
Brazil
Mexico
United States
American Samoa
Angola
Anguilla
Antigua and Barbuda
Aruba
Bahamas
Barbados
Belize
Bermuda
British Virgin Islands
Cayman Islands
Costa Rica
Cuba
Curaçao
Dominica
Dominican Republic
Grenada
Guadeloupe
Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Nicaragua
Panama
Puerto Rico
Saint Kitts and Nevis
Saint Lucia
Saint Vincent and the Grenadines
Trinidad and Tobago
Turks and Caicos Islands
U.S. Virgin Islands
United States
American Samoa
Australia
Cook Islands
Fiji
French Polynesia
Guam
Kiribati
Marshall Islands
Micronesia
Nauru
New Caledonia
Niue
Northern Mariana Islands
Palau
Papua New Guinea
Samoa
Solomon Islands
Tonga
Tuvalu
Vanuatu
Angola
Cabo Verde
Cameroon
Gabon
Gambia
Guinea-Bissau
Mauritania
São Tomé and Príncipe
Senegal
Brazil
Colombia
French Guiana
Guyana
Suriname
Venezuela
Maldives