Mass of small black caterpillars

Mass of small black caterpillars

Observation - Mass of small black caterpillars. Description: A writhing lump of small black caterpillars in what seemed like a web like nest attached to nettle leaves. They were approx 1/2 long

A writhing lump of small black caterpillars in what seemed like a web like nest attached to nettle leaves. They were approx 1/2" long