British Indian Ocean Territory

39 threatened species · Biodiversity Intelligence Dashboard

Threatened Species

39

CR + EN + VU

Critically Endangered

5

Highest risk

Endangered

10

Very high risk

Vulnerable

24

High risk

Declining

79%

31 species

Category Breakdown
CR 5
EN 10
VU 24
CR: 5
EN: 10
VU: 24

Critically Endangered

513%

Extremely high risk of extinction in the wild.

Endangered

1026%

Very high risk of extinction in the wild.

Vulnerable

2462%

High risk of extinction in the wild.

Threatened total — 39 species

Species by Group
🐾

mammals

1

1 threatened

🐦

birds

4

4 threatened

🐢

reptiles

1

1 threatened

🐟

fishes

24

24 threatened

Global Share

0.07%

of globally threatened species

Country Rank

#228

of 277 countries

Endemic Threatened

0

Found only here

Top Threats
1.Fishing & harvesting aquatic resources27 species
2.Habitat shifting & alteration15 species
3.Logging & wood harvesting11 species
4.Type Unknown/Unrecorded (pollution)9 species
5.Annual & perennial non-timber crops6 species
6.Housing & urban areas5 species
7.Recreational activities5 species
8.Marine & freshwater aquaculture5 species

How to Cite

IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS

GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org

This page: SpeciesRadar (2026). British Indian Ocean Territory: Biodiversity Dashboard. SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/countries/IO

Species counts reflect IUCN Red List threatened categories (CR, EN, VU). · Full citation guide & data usage terms

Frequently asked questions

How many threatened species are in British Indian Ocean Territory?
British Indian Ocean Territory has 39 threatened species recorded in the SpeciesRadar database — 5 of those are Critically Endangered (CR), facing an extremely high risk of extinction. The figures combine IUCN Red List data with national red list assessments where available.
What is the most endangered species in British Indian Ocean Territory?
Among the 5 Critically Endangered species in British Indian Ocean Territory, Ctenella chagius is one of the most at-risk — featured prominently on the country dashboard. The full list of CR species is filterable on the country page.
What protected areas exist in British Indian Ocean Territory?
Protected area coverage for British Indian Ocean Territory is summarised on the country dashboard, drawing on the World Database on Protected Areas (WDPA) and national park designations.