caterpillar from sand dunes, Wales

caterpillar from sand dunes, Wales

Observation - caterpillar from sand dunes, Wales - UK and Ireland. Description: I found this caterpillar among Marram Grass in the Ynyslas dunes, is it possible to confirm the ID? (Hope so as it would be a new species for me!)

I found this caterpillar among Marram Grass in the Ynyslas dunes, is it possible to confirm the ID? (Hope so as it would be a new species for me!)