 The female builds a 15 cm long pouch nest with a round side entrance, which is suspended from a thin branch 1–7 m high in a tree.The female incubates the two brown-blotched white eggs for 15–16 days to hatching.The black-capped pygmy tyrant is a tiny short-tailed bird, 6.5 cm long, and weighing 5.2 g. The crown is black, shading to dark grey on the rest of the head, and contrasting with the white “spectacles”.