Northern Eggar

Northern Eggar

Observation - Northern Eggar - UK and Ireland. Description: This large moth was in the light trap last night. Think it is an Oak Eggar and given location and darker marking, possibly the Northern form. Although my books are not too clear how you can separate Oak from Northern?

This large moth was in the light trap last night. Think it is an Oak Eggar and given location and darker marking, possibly the Northern form. Although my books are not too clear how you can separate Oak from Northern?