Coleophora trochilella is a moth of the Coleophoridae family. It is found in all of Europe, with possible exception of parts of the Balkan Peninsula. The wingspan is 11–14 mm. Adults are on wing from June to July. The larvae feed on Asteraceae species (Achillea, Artemisia vulgaris, Eupatorium, Tanacetum). They create a straw-coloured, slender, three-valved tubular case with a length of about 10 mm. The mouth angle is 45°-60°. The larvae are found at the leaf underside. Cases have been recorded from August to June of the following year.