The Knot Grass moth is not a grass moth in the usual sense (grass veneer, crambid) but is a noctuid. The moth is variable with greenish, greyish and even melanistic versions. It is native to most of temperate Eurasia.

In contrast to a moth with such muted colours, the caterpillar is brightly-coloured. The larvae don't eat grass but a range of low plant leaves, especially dock leaves (and possibly the knotgrass herb).

The Sycamore moth can be pale grey or, as above, dark grey, with pale underwings. Wingspan 35-45mm; UK flight time Jun-Aug. Hairy yellow/orange caterpillars feed on sycamore and other maples, horse chestnut, lime, mulberry and oak.