Achillea
Guides
Dichrorampha petiverella
Common Drill
Dichrorampha petiverella is a small tortricid moth with a wingspan of 10–13 mm, distributed across the Palearctic realm. Adults are active from April to August in western Europe, with larvae feeding internally on the rhizomes of yarrow (Achillea millefolium) and tansy. The species was first described by Linnaeus in 1758 and remains one of the more frequently recorded members of its genus due to its relatively broad host plant associations.
Ozirhincus millefolii
A gall midge in the family Cecidomyiidae. The species name 'millefolii' indicates association with Achillea millefolium (yarrow), a common host plant for this genus. Larvae develop within flower heads, inducing galls. Adults are small, delicate flies typical of the family.