Buff-tip Moth

The buff-tip moth is a member of the prominent moth family Notodontidae, found widely across Europe and temperate parts of Asia. It is one of the most celebrated examples of insect camouflage in the moth world, with a resting posture and wing pattern that together create a near-perfect imitation of a broken twig of silver birch.

At rest, the moth rolls its wings around its body into a cylindrical shape, with pale buff patches at both the head end and the wingtips resembling the pale, freshly broken ends of a snapped twig, while the silvery-gray mottled body in between mimics weathered bark. This combination of shape, posture, and coloration makes the resting moth exceptionally difficult to spot on tree branches or woodland litter.

The species is a well-known subject in discussions of cryptic camouflage and is commonly encountered by moth recorders and gardeners alike, with its caterpillars also being a familiar and easily recognized late-summer sight on deciduous trees.

• At rest, wings are rolled tightly around the body, forming a smooth cylindrical shape resembling a broken twig.
• Wings are silvery-gray with fine mottling along the central portion, bordered by pale buff-cream patches at the wingtips and near the head.
• Wingspan roughly 5–6.5 cm; body robust and furry, adding to the twig-like bulk.
• Antennae are feathery, especially in males, though usually concealed at rest.
• Distinguished from other camouflaged moths by its unmistakable rolled, cylindrical resting posture and the pale buff "snapped" ends.

Widespread across the United Kingdom, continental Europe, and temperate Asia, inhabiting deciduous woodlands, hedgerows, parks, and gardens wherever host trees such as birch, oak, lime, and hazel grow. Adults fly at night from late spring into midsummer, while caterpillars are most conspicuous in late summer.

Adults are nocturnal and rely almost entirely on camouflage rather than flight to avoid predators during the day, remaining motionless in their twig-like resting posture on branches or trunks. Caterpillars feed gregariously in groups on the foliage of deciduous trees, capable of stripping branches of leaves when numerous, and are boldly colored in yellow and black, a warning pattern in contrast to the cryptic adult. The species plays a role as both herbivore and prey within woodland food webs, particularly for birds and parasitoid insects.

Females lay clusters of eggs on the underside of host tree leaves, which hatch into gregarious caterpillars that feed together, often stripping entire branches before dispersing to feed individually as they mature. After several instars, the caterpillars burrow into the soil to pupate, and the pupa overwinters underground. Adults emerge the following late spring or early summer to mate and lay eggs, completing one generation per year in most of its range.