The Speckled Wood is a subtly beautiful, shade-loving butterfly with dark brown wings dappled with cream-yellow spots, giving it excellent camouflage as it basks in dappled sunlight on the woodland floor. As its name suggests, it favours woodland rides, hedgerows, and shady gardens far more than open, sunny habitats, and males are notably territorial, often seen engaging in spiralling aerial battles to defend a patch of sunlit foliage. Unusually among British butterflies, the adults feed mainly on honeydew secreted by aphids high in the tree canopy rather than on flower nectar. Its caterpillars feed on various grasses, including cock’s-foot, Yorkshire fog, and common couch.

Eggs are laid singly on grass blades in shaded, sheltered spots, and the caterpillars are green with faint pale stripes, feeding by night to avoid predators. The Speckled Wood is unusual in being able to overwinter at two different life stages — either as a caterpillar or as a chrysalis — which allows it to have a long and overlapping flight season with up to three generations between spring and autumn, making it one of the more complex and adaptable life cycles among British butterflies.