Adult: Pyracantha leaf-mining moths possess orange wings with white stripey markings. They are so small so are rarely spotted by gardeners.
Larvae: The caterpillars are also tiny, and may first be noticed from the silvery shiny blotches on the leaves of Pyracantha plants.
Mines: The mines begin to arise in Summer, but adult moths are active from as early as spring. Mines begin following the central vein of the leaf. They begin linear, but start to broaden creating a large, white-silvery blotch that can sometimes span the whole upper surface of the leaf. Once fully grown, the larvae leave the leaf, causing it to fold upwards. Gardeners tend to miss the mines for this reason.