Thank you Katrina - the landscape looks splendid up there right now; just a carpet of colour with orchids being the most striking and plentiful. If I could take shots of scenery like yourself (the sunset?) and Mark and David and a few others, then I would have included a picture, but for some reason I never seem able to compose them in a pleasing fashion.
Having reared all of the British Hairstreaks with the exception of the Green Hairstreak, I decided it was time to put that right. As usual, I went through the correct procedure and obtained permission to remove a few eggs from a local site having explained my intentions and objectives. I spent a considerable amount of time watching the Green Hairstreak this year, including many females egg-laying, so it wasn’t too difficult to locate one egg on Dogwood and one egg on Bird’s Foot Trefoil by way of comparison. I was surprised to see the egg laid on the leaf of the Dogwood as I had thought they were usually laid within the buds where they are difficult to locate. However, I know that Green Hairsteak will lay on a variety of plants including Gorse and Broom which I witnessed a few years ago. Despite the diversity of potential larval food plants I had always assumed (for some unknown reason) that any one female would select a single plant type and deposit her eggs on them. However, I watched the same individual egg-laying on 3 different types of plant – Dogwood, BFT and unknown – so perhaps she was hedging her bets, not putting all her eggs in one basket, so to speak!
Back to the rearing. I felt that 2 eggs was plenty – my heir and spare, meaning that if something unfortunate were to happen to one then I still have a second chance to monitor, learn from, and yes, photograph the other, without the responsibilities associated with rearing large numbers of larva (e.g. space, food etc).
8 days after the first egg was laid, I was delighted to watch it hatch, and recorded it with the camera as usual.



















The next morning I thought I was seeing double as there were 2 tiny larva, side by side on the leaf!! I can only assume that another egg had been laid, unbeknown to me and undetected, in the flower buds. Having read that these larva have cannibalistic tendencies after the first instar I was in a bit of a dilemma. The leaf where the original egg had been laid was quite some distance from the buds meaning that the second tiny larva had travelled some considerable way to be there – and for what purpose? Was it purely co-incidence or was there some significance to that I wondered? Perhaps they weren’t cannibalistic after all? Perhaps the butterfly laid more than one egg in close proximity to ensure that at least one of them had access to a good meal ? Perhaps laying several eggs together (either by the same or different egg-laying females) was a strategy to compensate for the significant losses due to other predators which undoubtedly occurs (in collecting food plants at a later date I was to see several examples where several larva shared a flower head). All of these questions and more were going through my head but in the event I decided to leave the 2 tiny larva where they were. Unfortunately, the next morning one of them was missing!

I scrutinised the branch without success so naturally I feared the worst and resigned myself that their cannibalistic tendencies did indeed start from an early age. However, later that day he re-appeared next to the other larva leading me to conclude that he had made the long trek back to his bud and hidden inside it so that he was unable to be detected, before making the long trek back again. This time I decided ‘safe’ was better than ‘sorry’ and separated the 2, thereby depriving myself of the opportunity of testing out for myself at what point, if any, they become a threat to each other. One thing I found particularly interesting was their eating habits. I had read that the flower buds and small, tender leaves were consumed in preference to the larger, tough leaves but initially I did not find that to be the case. Even the larva who presumably hatched out in the buds and had returned there at least once, spent time on the larger leaves, eating from their surface without actually going right through the leaf, in a wiggly sort of pattern reminiscent of a leaf mining insect or similar.
After 2 days of inactivity, and at 7 days old, I was lucky enough to see them shed their skins for the first time, which they subsequently ate:
However, after the first moult this eating pattern changed, immediately and significantly – the larva started eating huge chunks of these tough leaves, biting right through them and leaving fair sized holes. The leaf below shows both of these feeding patterns: