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Friends of Midway Atoll

Friends of Midway Atoll

Preserving, protecting, and restoring the biological diversity and historic resources of Midway Atollal Wildlife Refuge

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Home/Explore & Learn/Plants & Wildlife/Birds/Masked Booby

Masked Booby

Hawaiian name: ‘A

Scientific name: Sula dactylatra

Masked Booby Pair
Photo credit: Daniel Clark/USFWS
  • Life Span: > 20 years
  • Wingspan: 152 cm (62 in)
  • Breeding Ecology
    • Breeds in Main and Northwestern Hawaiian Islands, and throughout tropical regions of Pacific, Atlantic, and Indian Oceans
    • 2 eggs/clutch (only 1 chick survives); 1 clutch/year (replacement laying occurs)
    • Masked Boobies nest in small numbers at Midway; historical data suggest they were never particularly numerous; generally fewer than five nesting attempts per year
  • Boobies lack a brood patch and incubate with their feet.

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Friends of Midway Atoll

17 Katrina Lane
San Anselmo, CA 94960

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