Hampshire and Isle of Wight Butterfly and Moth Society
Hampshire and Isle of Wight Butterfly and Moth Society
| Family: | Nymphalidae |
| Subfamily: | Satyrinae |
| Genus: | Maniola |
| Species: | jurtina |
| Authority: | (Linnaeus, 1758) |
The Meadow Brown is one of our commonest and most widespread butterflies, and a familiar sight throughout the summer months. This species can be found in all parts of the British Isles, with the exception of the most mountainous regions and Shetland. This is a highly variable species with four named subspecies found in the British Isles, although the differences between them are often subtle.
| #Individuals | #Tetrads | 2022 | 2023 | Abundance Trend | 2022 | 2023 | Distribution Trend |
|---|---|---|---|---|---|
| 86499 | 135667 | +56% | 772 | 884 | +14% |
| #Records | #Individuals | Earliest Record | Latest Record | |
|---|---|---|---|---|
| All Records | 239,868 | 2,285,356 | 30/04/2011 | 13/11/2022 |
| 2023 | 16,963 | 135,667 | 21/5/2023 | 24/10/2023 |
| Location | Date | Quantity | |
|---|---|---|---|
| Earliest Record | Ox Drove Meadow transect: Section 1 | 21/5/2023 | 10 |
| Latest Record | Portsdown Hill | 24/10/2023 | 2 |
| Highest Count | Stockbridge Down | 20/8/2023 | 1,058 |
One of the issues with 'raw' trend data is that there is inherent bias based on the number of recorders. For example, the number of individuals and populated tetrads recorded are likely to increase if there is an increase in the number of recorders. In order to remove this bias, the normalised trends use data that has been recalculated using the average number of recorders over the trend period. This normalisation gives a much better picture of the true trends.
Average #Recorders: 701.68
Average #Recorders: 701.68