Back on the last day of March, the Speckled Wood was the fourth butterfly to be added to my 2026 butterfly list (since then I’ve also seen the first Holly Blue and the first Orange Tip of the year, though neither paused long enough to allow me to photograph them), and by coincidence this morning there were four males having a Butterfly Battle down in the wild garden. Considering that they’ve only been out for a couple of weeks, two were already looking surprisingly ragged, but this chap and the fourth specimen were both fresh and pristine.
Unusually among our native butterflies, the Speckled Wood is increasing in number and expanding its range, meaning that it’s one of the few British species that isn’t regarded as being of conservation concern. As its name suggests, it’s a woodland specialist, but it can turn up anywhere with enough tree or scrub coverage to provide the dappled shade it favours. Uniquely among native species it can overwinter as either a pupa or a third instar larva, and it can go through either two or three broods in a year, depending on local climatic conditions. Here in the Shire I expect three, with an early appearance of the first adults. Climate also affects the colouration of local populations of this butterfly, with those from the north having a darker ground colour and paler markings than this, and those from the Channel Islands and southern Europe having a lighter ground with white and orange markings.
Males like this one have a wingspan averaging a fraction less than 5cm, while females are a little larger and their wings are a slightly more rounded shape. Both sexes feed up in the tree canopy on honeydew and sap runs, but they will take nectar from a variety of plants and trees if their preferred sugars are in short supply. The larvae develop and feed on a variety of grasses.
The mating habits of the Speckled Wood have been studied extensively, and are described quite well in this Wiki. One interesting observation made by lepidopterists is that males that are generally paler and take longer to warm up tend to be less active than darker specimens, adopting a perch and waiting there to be found by a female, while the darker males tend to do more patrolling in search of mates. The paler, more static males also tend to have four eye spots on the upper surface of their hindwings, presumably as an extra defence against predation, while the darker, more active individuals generally only have three. If that rule of thumb holds true here, I’d expect this particular male – whose hindwing eye spot count is two plus a vague dot – to be very active indeed.
While I’m happy to link Wikipedia for further reading, most of the information for this post came from one of the best and most interesting books in my little natural history library. It’s called Life Cycles of British and Irish Butterflies, by Peter Eeles, and though it’s a little expensive at £35, I do believe it’s worth the price. I honestly doubt that I’ll ever feel the need to buy another book on this topic.
R: L2, C8, D2.
