Brown Booby
EN

Brown Booby

Sula leucogaster

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Brown_booby

Overview

The brown booby is a large seabird in the booby and gannet family Sulidae, of which it is one of the most common and widespread species. It has a pantropical range, which overlaps with that of other booby species. The gregarious brown booby commutes and forages at low height over inshore waters.

Flocks plunge-dive to take small fish, especially when these are driven near the surface by their predators. They nest only on the ground, and roost on solid objects rather than the water surface.

Brown Boobies face significant threats from habitat loss due to coastal development and human disturbance at nesting colonies. Climate change impacts, including sea level rise and altered ocean conditions affecting prey availability, pose additional challenges to breeding success and population stability.

Threat summary

Habitat

This species breeds on islands and coasts in the pantropical areas of the Atlantic, Indian and Pacific oceans. They frequent the breeding grounds of the islands in the Gulf of Mexico and the Caribbean Sea. With the rise in pollution in the world, brown boobies have been using marine debris to make their nests, with 90.1% of these nest were consisted of plastic, while nests near shipwreck have a...

MARINE· majorTERRESTRIAL· major

Other threatened species in Sulidae

Frequently asked questions

Why is Brown Booby classified as Endangered?
Brown Booby is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Brown Boobies face significant threats from habitat loss due to coastal development and human disturbance at nesting colonies. Climate change impacts, including sea level rise and altered ocean conditions affecting prey availability, pose additional challenges to breeding success and population stability.
Where does Brown Booby live?
Brown Booby occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Brown Booby?
The main threats to Brown Booby are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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