Scientific name: Cossus cossus
June to July. Nationally scarce, found only in a few scattered locations in England. A large thickset moth with grey-brown wings covered in a delicate pattern of lines which resemble cracks in bark.
One of only three species of this family that are found in the British Isles. The adults are incapable of feeding. The caterpillars live inside the trunks of a variety of broadleaved trees feeding on the wood. They overwinter three or four times as larvae and a final time as pupae.
Size and Family
- Family – Leopard and Goat moths (Cossidae)
- Large Sized
- Wingspan Range – 64-84mm
- UK BAP: Priority species
- Nationally Scarce B
Caterpillar Food Plants
Under the bark and in the heartwood of a range of broadleaved trees especially those in damp areas, including sallows, willow and poplars, Ash (Fraxinus excelsior), birches, oaks, Alder (Alnus glutinosa), Apple (Malus domestica) and other fruit trees.
Riverbanks, fens, marshes, parkland, golf courses, hedgerows and woodland edges.
- Countries – England
- Nationally scarce B. Found in widely scattered locations in eastern England south of the Wash, along the south coast from Devon to Kent and in the Thames Valley.