Caterpillar on garden Spanish Bluebell

Caterpillar on garden Spanish Bluebell

Observation - Caterpillar on garden Spanish Bluebell - UK and Ireland. Description: Greenish caterpillar about 50mm long aligned along a Spanish Bulebell stem in a roadside garden in Petersfield, Hampshire

Greenish caterpillar about 50mm long aligned along a Spanish Bulebell stem in a roadside garden in Petersfield, Hampshire