Thanks Wurzel, David, Pauline, Ernie, Goldie and Bugboy for all those comments
White-Letter Hairstreak & Elm - NOW Is The Time To Look For Larvae
The window of opportunity for easily locating Elms is rapidly closing. However, as one window closes a new one opens. NOW is a great time to be out looking for White-Letter Hairstreak larvae. Timing will, as mentioned before, vary from place to place and tree to tree, but in most places larvae will now be at their most conspicuous feeding on the leaves. The larvae are still very well camouflaged but once you get your eye in they are easier to locate. Often the leaf damage can be a giveaway but even this varies from place to place. If you can view leaves from underneath with the light above the larvae often stand out as a silhouette. Low branches (or a ladder

) is a key requirement when searching for larvae.
All of the larvae in the following reports were found between chest and just above head height and all were between 10mm and 15mm in length.
Southwick 4.5.2019 - I visited my prime White-Letter Hairstreak site at Southwick yesterday to get my eye in. The low branch that provided much in the way of egglaying and larvae last year seems to be dead. It had eggs on it which have all hatched, but no flower or leaf buds are open. On other similar low branches nearby I was able to locate half a dozen larvae fairly easily. As mentioned previously these branches are not in full sun, they are in the understorey partially shaded by foliage above. Also the leaves here are distinctly more mature than in other locations.

- Southwick - Larvae showing leaf damage. Leaves in this location are distanctly tougher and more mature looking than those at Old Winchester Hill for instance. Feeding damage is subsequently subtly different in the two locations.

- Southwick - Larva viewed from under the leaf. A handy way of spotting larvae that are just out of reach.
Old Winchester Hill (SU64182136) 5.5.2019 - With my eye now 'in' I ventured to a new site. I mentioned Old Winchester Hill a few posts ago and that was my destination today. Here, the seed is now brown and falling rather than green, but the trees are still quite prominent in the landscape due to the fresh leaf growth. As is often the case with a new site, more time and effort is required for smaller rewards, but I was pleased to locate 2 larvae in an hour.

- Old Winchester Hill - These trees still stand out in the landscape due to the bright green new leaf growth

- Old Winchester Hill - Larva showing distinct leaf damage

- Old Winchester Hill - View from above and below leaf cluster.
Whitchurch (SU45734773) 7.5.2019 - Today, whilst at work I was driving from Andover to Burghclere along the B3400 Andover Road. This is a route I have not travelled on before. I spotted a promising looking tree and was in a position to stop and investigate. Unbelievably, the first cluster of leafs I looked at had a White-Letter Hairstreak larva on it

. I could hardly believe my eyes. In fact I promptly walked along the road side and bashed my head on a road sign and dazed myself a bit more

. No research here or weeks of previous visits, just a 5 minute stop off on the spur of the moment.