Nigeria vs Sierra Leone: Share of freshwater Key Biodiversity Areas that are protected
Nigeria
73.8%
in 2025
Sierra Leone
71.1%
in 2025
Nigeria rank
53rd
Sierra Leone rank
55th
Share of freshwater Key Biodiversity Areas that are protected over time
- Nigeria
- Sierra Leone
How they compare
Nigeria currently reports 73.8% against 71.1% in Sierra Leone, a difference of 2.7%.
The two have swapped places 1 time across 26 shared years of data; in 2000 it was Sierra Leone ahead.
Nigeria ranks 53rd and Sierra Leone ranks 55th of 164 countries.
Across the 3 decades both report, Nigeria averaged higher in 2 and Sierra Leone in 1.
Head to head by decade
| Decade | Nigeria | Sierra Leone | Difference | Ahead |
|---|---|---|---|---|
| 2000s | 40.2% | 56.4% | 16.2% | Sierra Leone |
| 2010s | 73.8% | 70.4% | 3.3% | Nigeria |
| 2020s | 73.8% | 71.1% | 2.6% | Nigeria |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher share of freshwater key biodiversity areas that are protected, Nigeria or Sierra Leone?
- Nigeria, at 73.8% against 71.1% in Sierra Leone as of 2025.
- What is the difference in share of freshwater key biodiversity areas that are protected between Nigeria and Sierra Leone?
- 2.7%, with Nigeria ahead.
- How many years of comparable data are there for Nigeria and Sierra Leone?
- 26 years are reported by both, from 2000 to 2025.
- How do Nigeria and Sierra Leone rank globally for share of freshwater key biodiversity areas that are protected?
- Nigeria ranks 53rd and Sierra Leone ranks 55th of 164 countries.
- Where does this data come from?
- BirdLife International, IUCN and UNEP-WCMC – processed by Our World in Data, published as Share of freshwater Key Biodiversity Areas that are protected. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Average proportion of Freshwater Key Biodiversity Areas (KBAs) covered by protected areas (%).