Bulgaria vs Sierra Leone: Red List Index
Bulgaria
0.92 index
in 2025
Sierra Leone
0.92 index
in 2025
Bulgaria rank
61st
Sierra Leone rank
61st
Red List Index over time
- Bulgaria
- Sierra Leone
How they compare
Bulgaria currently reports 0.92 index against 0.92 index in Sierra Leone, a difference of 0 index.
The two have swapped places 2 times across 46 shared years of data; in 1980 it was Sierra Leone ahead.
Bulgaria ranks 61st and Sierra Leone ranks 61st of 247 countries.
Bulgaria has averaged higher in every one of the 5 decades both report.
Head to head by decade
| Decade | Bulgaria | Sierra Leone | Difference | Ahead |
|---|---|---|---|---|
| 1980s | 0.93 index | 0.93 index | 0 index | — |
| 1990s | 0.929 index | 0.928 index | 0.001 index | Bulgaria |
| 2000s | 0.92 index | 0.92 index | 0 index | — |
| 2010s | 0.92 index | 0.92 index | 0 index | — |
| 2020s | 0.92 index | 0.92 index | 0 index | — |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher red list index, Bulgaria or Sierra Leone?
- Bulgaria, at 0.92 index against 0.92 index in Sierra Leone as of 2025.
- What is the difference in red list index between Bulgaria and Sierra Leone?
- 0 index, with Bulgaria ahead.
- How many years of comparable data are there for Bulgaria and Sierra Leone?
- 46 years are reported by both, from 1980 to 2025.
- How do Bulgaria and Sierra Leone rank globally for red list index?
- Bulgaria ranks 61st and Sierra Leone ranks 61st of 247 countries.
- Where does this data come from?
- BirdLife International and IUCN – processed by Our World in Data, published as Red List Index. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Red List Index.