Research and analysis
D6aii: Long-term and short-term changes in the relative abundance of individual priority species in England, 1970 to 2023
Updated 1 December 2025
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| period | trend | percentage |
|---|---|---|
| Long term (1970–2023) | Strong decrease | 45.3 |
| Long term (1970–2023) | Weak decrease | 20.5 |
| Long term (1970–2023) | Little or no change | 17.4 |
| Long term (1970–2023) | Weak increase | 5.6 |
| Long term (1970–2023) | Strong increase | 11.2 |
| Short term (2018–2023) | Strong decrease | 34.0 |
| Short term (2018–2023) | Weak decrease | 11.3 |
| Short term (2018–2023) | Little or no change | 13.8 |
| Short term (2018–2023) | Weak increase | 8.8 |
| Short term (2018–2023) | Strong increase | 32.1 |