Cochylidia heydeniana, the blue-fleabane conch, is a moth of the family Tortricidae.

It is found from most of Europe[2] to China (Xinjiang), Mongolia, Korea, Russia[3] and Japan.

The habitat consists of dry pastures, wasteland and sand dunes.

[4] Adults are on wing from April to May and again in July in two generations per year.

The larvae feed on Erigeron acer, Conyza canadensis and Solidago virgaurea.