As their name suggests, Grass Moths are usually found in grassy situations. A typical example, the Straw Grass-veneer (Agriphilia straminella) is common and widely distributed although its small size (8-10mm} makes it difficult to spot while resting in the grass. However, adult moths are easily disturbed by walking through grass and are sometimes abundant. They frequently fly short distances before settling, with their wings closely folded, on grass stems or lower down amongst tufts where they can be harder to see.  They rest with wings held tightly in the characteristic grass-moth position and with their antennae swept back over their body. Females are generally paler than males. Unless disturbed, they mostly fly late in to the afternoon as well as at night, when they are attracted to light.

Although Grass-Moths can be abundant in their natural grass habitat some can be found resting on walls (or as in these captures) on leaves or stems.