Jersey

163 threatened species · Biodiversity Intelligence Dashboard

Threatened Species

163

CR + EN + VU

Critically Endangered

33

Highest risk

Endangered

41

Very high risk

Vulnerable

89

High risk

Declining

15%

24 species

Category Breakdown
CR 33
EN 41
VU 89
CR: 33
EN: 41
VU: 89

Critically Endangered

3320%

Extremely high risk of extinction in the wild.

Endangered

4125%

Very high risk of extinction in the wild.

Vulnerable

8955%

High risk of extinction in the wild.

Threatened total — 163 species

Species by Group
🦗

insects

72

72 threatened

🐦

birds

20

20 threatened

🌱

plants

18

18 threatened

🐟

fishes

15

15 threatened

🐚

molluscs

14

14 threatened

🕷️

arachnids

7

7 threatened

🪱

other invertebrates

6

6 threatened

🍄

fungi

6

6 threatened

🦀

crustaceans

2

2 threatened

🐾

mammals

1

1 threatened

🐢

reptiles

1

1 threatened

🪸

corals

1

1 threatened

Global Share

0.29%

of globally threatened species

Country Rank

#149

of 250 countries

Endemic Threatened

0

Found only here

Top Threats
1.Urban development and infrastructure expansion21 species
2.Fishing & harvesting aquatic resources20 species
3.Habitat loss and fragmentation11 species
4.Agricultural intensification and pesticide use10 species
5.Agricultural intensification and habitat conversion9 species
6.Logging & wood harvesting9 species
7.Coastal development and urbanization8 species
8.Agricultural intensification8 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). Jersey: Biodiversity Dashboard. SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/countries/JE

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 Jersey?
Jersey has 163 threatened species recorded on SpeciesRadar — 33 of those are Critically Endangered, facing an extremely high risk of extinction. The figures combine IUCN Red List data with national red list assessments where available.
How many Critically Endangered, Endangered, and Vulnerable species does Jersey have?
Of the 163 threatened species in Jersey, 33 are Critically Endangered, 41 are Endangered, and 89 are Vulnerable. Together these three IUCN Red List categories make up the "threatened" total.
What is the most endangered species in Jersey?
Among the 33 Critically Endangered species in Jersey, Nicrophorus interruptus is one of the most at-risk — featured prominently on the country dashboard. The full list of Critically Endangered species is filterable on the Species tab.
What protected areas exist in Jersey?
SpeciesRadar does not yet catalogue protected areas for Jersey. Where available, protected-area data is drawn from the World Database on Protected Areas (WDPA) and national designations.
Which animal and plant groups are most threatened in Jersey?
The most affected groups in Jersey, by number of threatened species, are insects (72), birds (20), and plants (18). The full taxonomic breakdown is shown on the country dashboard.
What are the biggest threats to wildlife in Jersey?
The leading threats to threatened species in Jersey are urban development and infrastructure expansion, fishing & harvesting aquatic resources, habitat loss and fragmentation, and agricultural intensification and pesticide use. Each threat is mapped to the species it affects in the country's threat breakdown.
How many of Jersey's threatened species have declining populations?
24 of Jersey's threatened species have populations that are still declining. Reversing these trends is the central focus of the conservation work the country dashboard tracks.
How does Jersey compare to other countries for threatened species?
Jersey ranks #149 of 250 countries by number of threatened species, and accounts for roughly 0.29% of all threatened species tracked worldwide. Threat is geographically concentrated, so a high rank reflects both rich biodiversity and intense pressure on it.
Where does the data for Jersey come from, and can I download it?
SpeciesRadar draws on the IUCN Red List, the Global Biodiversity Information Facility (GBIF), the World Database on Protected Areas, and national red lists. Every table on the Jersey profile — species, national red list, and protected areas — can be downloaded as a CSV spreadsheet or a branded PDF report.