Photo © Russell Wynn

Goat Moth

Cossus cossus

Checklist Number
50.001 [B&F: 0162]

Verification
Record will normally be accepted but photo evidence may be required - check with CMR if not sure of identity

Classification

Family:Cossidae
Subfamily:Cossinae
Genus:Cossus
Species:cossus
Authority:(Linnaeus, 1758)

A UK BAP species in fens, marshes, river-banks, damp areas, golf courses, heaths and woodland edges in parts of the British Isles, less numerous in the north. In Hampshire and on the Isle of Wight mainly confined to the New Forest, with scattered records elsewhere. Wingspan male 68-84 mm, female 88-96 mm. The larvae feed internally in living wood or pith of a range of broadleaved trees especially those in damp areas, including sallows, willow and poplars, Ash, birches, oaks, Alder, Apple and other fruit trees, and take several years to mature. Sometimes trees in which the Goat Moth is present will be obvious, with multiple entrance holes indicating larval workings.
When full-fed, the larvae leaves the tree it has been feeding in and wanders, looking for a pupation site underground: many records are of such individuals found by walkers. The adult moth very occasionally visits light traps.

The abundance in each month is indicated as follows:

No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time
J F M A M J J A S O N D
Adult
Larval

Records by week (adult)

Records by week (larval)