15/05/2026
In response to the recent Berks, Bucks and Oxon Wildlife Trust - BBOWT report on Glow-in-the-dark Caterpillars -late last night several intrepid hunters went in search of the Hairstreak Butterfly larvae . After a slow start (a few cutworm caterpillars, some cuckoo spit, webs and eggs), the second stand of Blackthorn revealed what we had come looking for. Where we had found 6 eggs in January, within just an hour, 16 Hairstreak caterpillars fluoresced in the UV torch light!
Why not have a go yourself.
See our interpretation board for the life cycle of the Brown Hairstreak butterfly.