Tomtit

Overview

The tomtit (Petroica macrocephala) is a small passerine bird in the family Petroicidae, endemic to the islands of New Zealand. Known in Māori as miromiro on the North Island and ngirungiru on the South Island, the species displays considerable variation in plumage and size across its five recognised subspecies.

Identification

• A small bird, approximately 13 cm in length and 11 g in weight, characterised by a disproportionately large head and a short bill.
• North Island males feature a black head, back, and wings with a distinct white wing-bar and a white belly; females of this subspecies have brown upper parts instead of black.
• South Island, Chatham Islands, and Auckland Islands subspecies resemble the North Island males but possess a yellow band across the breast separating the black head from the white belly.
• The Snares Island subspecies is entirely black, known as the black tit, while island subspecies generally exhibit larger body sizes than their mainland relatives, with Snares birds weighing up to 20 g.

Habitat

The tomtit is endemic to New Zealand, ranging across the main islands as well as several outlying island groups including the Snares, Chatham, and Auckland Islands. The species is classified as Least Concern by the IUCN and has successfully adapted to changes in New Zealand's biodiversity.

Diet

Primarily an insectivore, the tomtit feeds on small invertebrates such as beetles, caterpillars, spiders, moths, wētā, earthworms, and flies, supplementing its diet with fruit during winter and autumn. Most subspecies forage by waiting on a perch in vegetation to watch for prey or by gleaning insects from branches and leaves, whereas the Snares subspecies also feeds on the ground.

Did you know?

The name 'tomtit' was originally a shortened form of 'Tom titmouse' and was historically used as an alternate name for the blue tit in England. In Māori tradition, the miromiro is celebrated for its intelligence, with a Te Arawa story describing how Te Rongorere used a pet miromiro to search for his mother across the North Island.