A large, strong-flying butterfly restricted to the Norfolk Broads, although migrants are occasionally seen elsewhere. Pale yellow wings with black veins and blue margins.

This is one of our rarest and most spectacular butterflies. The British race britannicus is a specialist of wet fenland and is currently restricted to the Norfolk Broads. Here the adults can be seen flying powerfully over open fen vegetation, stopping to feed on flowers such as thistles and Ragged-Robin.

At rest the wings are held over the body like a tent. The triangular-shaped forewing has a curved leading edge.

The adults mainly fly at night and are attracted to light, usually only on warm nights. The caterpillars can be found from August to the following May overwintering as fully grown larvae in gall-like cocoons on a leaf or twig.

The males have six yellow bands but the females have only five, both with orange scales on the tip and along the central bar of the forewings and largely yellow legs.

The adults can sometimes be found using sweep nets. The caterpillars feed inside the roots of the foodplant from July to the following May, overwintering as larvae.

Similar in size and appearance to the Currant Clearwing but missing the yellow collar or thorax markings of the Currant Clearwing.

The caterpillars spend two years feeding in thin stems of the willow foodplant causing a pear-shaped gall overwintering as larvae.

The only British emerald moth which is not green in colour, the wings are beige or brown with subtle reddish freckling.

The adults fly at night and area attracted to light. At rest they hang from grass stems and can be disturbed from vegetation during the day. The caterpillars can be found from August to late the following May overwintering as small larvae on the foodplant near the ground.

The forewings are marked with reddish-brown scales, particularly around the edges. At rest the wings are held close to the body. The males have seven yellow bands on the abdomen whereas the females have only six but both have a yellow tail fan.

They overwinter twice as larvae in the roots of the Raspberry plant, producing a gall at the base on the stem in the second year.

There are two distinct yellow bands on the abdomen but sometimes there are additional faint bands. The antennae are black.

The caterpillars spend two years feeding in thin stems of the foodplant, overwintering as larvae.

The distinctive central cross-line is largely red and as the name suggests it is often accompanied by a central reddish blush on the forewings. The forewing tip is pointed and the outer edge has a central bulge.

The adults are sometimes seen during the day resting on the leaves of trees or Bracken and other vegetation. They feed on tree flowers at night and are attracted to light. The larvae can be found from late June to July and mid-August to September before they overwinter as pupae attached to a fallen oak leaf.

Similar in appearance to the Hornet Moth it can be distinguished by the black head and shoulder and a yellow collar. It is also smaller in size.

They usually overwinter twice as larvae. In the first year the caterpillars feed close to the ground but move slightly higher up the tree trunk in the second year.

Size and Family

Similar in appearance to the Lunar Hornet Moth it can be distinguished by the yellow patches on the head and shoulder and a black collar. The adults can be found resting on poplar trunks after they have emerged in June.

They overwinter at least twice as larvae for the first and sometimes second winter and as fully grown larvae in cocoons for the second or third winter. They mainly feed on the wood just below the bark surface near ground level and emerge from a hole near the base of the trunk.

Subscribe to Yellow