The Holly Blue butterfly Celastrina argiolus is a widespread species occurring across much of England and Wales. Its numbers fluctuate widley and in a fairly regular manner.
![](https://www.britishwildlife.com/wp-content/uploads/1999/10/17.6-Holly-blue-e1673525271993.jpg)
The Holly Blue butterfly Celastrina argiolus is a widespread species occurring across much of England and Wales. Its numbers fluctuate widley and in a fairly regular manner.