Research and analysis
D4ii: Long-term and short-term changes in the relative abundance of individual species in England, 1970 to 2023
Updated 1 December 2025
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| period | trend | percentage |
|---|---|---|
| Long term (1970–2023) | Strong decrease | 22.2 |
| Long term (1970–2023) | Weak decrease | 17.3 |
| Long term (1970–2023) | Little or no change | 27.7 |
| Long term (1970–2023) | Weak increase | 12.8 |
| Long term (1970–2023) | Strong increase | 20.0 |
| Short term (2018–2023) | Strong decrease | 30.5 |
| Short term (2018–2023) | Weak decrease | 9.5 |
| Short term (2018–2023) | Little or no change | 14.7 |
| Short term (2018–2023) | Weak increase | 7.8 |
| Short term (2018–2023) | Strong increase | 37.4 |