Grey Warbler

Overview

The Grey Warbler is a tiny, unobtrusive songbird found throughout New Zealand, more often heard than seen due to its plain colouring and habit of foraging high in the canopy. Its long, warbling song is a familiar sound of New Zealand forests and gardens.

• Family: Acanthizidae (Australasian warblers)
• Distribution: throughout New Zealand, including many offshore islands
• Notable trait: constant tail-flicking while foraging

Feather Identification

Plumage is understated, grey-brown above and paler grey below, with a faint whitish eyebrow and a red or reddish eye that stands out on the plain face. The tail is fairly long relative to the tiny body and is frequently flicked open, showing small white tail-corner spots in flight. There is no bold wing pattern or barring.

• Overall tone: plain grey-brown, no strong markings
• Key mark: red eye and habitually flicked tail with white corners
• Compare with: Silvereye (has a bold white eye-ring, lacking in the Grey Warbler) and other small grey songbirds

Plumage

Sexes look alike, with little visible difference between males and females. Juveniles are similar to adults but slightly duller, with the eye colour taking time to develop its full reddish tone. There is minimal seasonal plumage variation.

Habitat & Range

Grey Warblers occupy a wide range of wooded habitats, from native forest and scrub to exotic plantations and well-treed gardens, throughout New Zealand and many offshore islands. They are largely sedentary, holding small territories year-round.

Behavior & Field Notes

This species forages actively for small insects and spiders, gleaning them from leaves and twigs, often high in the canopy, constantly flicking its tail and wings. Its song is a long, wavering, trilling series of notes, quite distinctive despite the bird's plain appearance. It builds a domed, pear-shaped nest with a side entrance, suspended from a branch.

• Diet: small insects and spiders
• Voice: a long, wavering trill, one of the more musical small-bird songs in New Zealand forest
• Field note: frequently detected by song well before being seen, owing to its plain colouring and habit of foraging in dense or high foliage