A scarce species, partly due to many of its larval food plant, Elm trees, being lost to Dutch Elm disease. It spends much its time around the tops of tall trees, and is not very noticeable when it occasionaly descends to take nectar - and likely to be under-reported.The Elms in the spinney next to the paddock and in the neighbouring hedges have grown from suckers, and are usually fairly short lived.

White-letter Hairstreaks produce just one brood per year and over-winter as eggs.