Batrachedra praeangusta is a moth of the family Batrachedridae which is native to Europe.

The forewings have a white background, with a mix of sooty black and paler colour and the hindwings are shining grey, becoming lighter towards the end.

[2] The moth is univoltine (i.e. one generation a year) flying from mid-June to early-September, and can be found on tree trunks and comes to light.

The larva take twenty days to develop and can be found from April to June.

[3] The larva leaves it web and forms a bright-brown slender pupa, in a narrow felt-like cocoon covered in lichen.