Elachista catarata

Elachista catarata is a moth of the family Elachistidae that can be found in eastern New South Wales, the Australian Capital Territory and Tasmania.

The wingspan is 7.8 - 8.8 mm for males and 7.8 - 9.5 mm for females.

The larvae feed on Carex appressa and Carex longebrachiata. They mine the leaves of their host plant. The mine reaches a length of about 200 mm.