A very rare small robin endemic to the Chatham Islands of New Zealand. Almost went extinct in the 1980s. Both sexes are entirely black. Confined to two offshore nature reserves in the Chatham Islands. Often stands alert, perching in a slightly hunched manner. Feeds on invertebrates in the soil and substory vegetation, making quick forays from perches in the understory. The male song is simple, consisting of 4-5 clear notes. Females will sing brief phrases every so often. Actively investigates any human activity within its territory. Tomtit has a pale underside, so should not be confused.