Notornis 54: 15-19. The eggs, weighing 1.5 grams are about 17 millimetres long and 12 millimetres wide. The grey warbler (Gerygone igata), also known by its Māori name riroriro[2] or outside New Zealand as the grey gerygone, is an insectivorous bird in the family Acanthizidae endemic to New Zealand. Begging call matching between a specialist brood parasite and its host: a comparative approach to detect coevolution. The grey warbler is a tiny, slim grey songbird that usually stays among canopy foliage. Adult females have variable amounts of black on the throat and are often paler than males. Territorial song (tomtit & silvereye in background), Territorial song (house sparrows in background). In flight, silvereyes have a plain dark tail without a white tip. Females lay 3-5 eggs per clutch. | NZETC,, Creative Commons Attribution-ShareAlike License, NZ Royal Forest and Bird Protection Society, Nov 2003, This page was last edited on 25 October 2020, at 20:54. The tail is white underneath and dark brown on top with white tips being visible in flight. They sing throughout the year but most vigorously when nesting, during spring. grey warbler, Gerygone igata, found in New Zealand Birds' bird gallery section, includes general information about the bird, taxonomy, description, where to find them and other useful and interesting information. These diminutive insectivorous birds busy themselves along branches seeking out small invertebrates. Grey warblers are often heard more than they are seen. Briskie, J.V. Grey warblers mainly feed upon spiders, insects and their larvae. Adult. [3] It has grey-brown plumage (with a slight olive-green tint), with the face, throat and breast being pale-grey. ; Ross, H.A. Gill, B.J. They are typically seen foraging on the bark of trunks and branches of trees, or hovering just outside the canopy while they glean insects from the outer leaves. One of the smallest birds found in New Zealand, grey warblers are about 11 centimeters long, with a weight of up to 6.5 grams. It has grey-brown plumage (with a slight olive-green tint), with the face, throat and breast being pale-grey. Use available access ways to get to the beach. Alpine tussock is one of the few vegetated habitats where you are unlikely to find grey warblers. The abdomen is off-white with a slight yellow tinge. In Miskelly, C.M. Weighing about 6.5g, which is around one-third the weight of a mouse, makes them one of New Zealand's lightest birds. Grey warblers are entirely insectivorous, feeding mainly on caterpillars, flies, beetles, moths and other small invertebrates. They will quite likely visit your garden if you plant native shrubs for them to safely build their nests in. The finely pointed bill and slender legs are black, the eye is bright red, and birds often glean insects from the outside of the canopy while hovering. Nestlings and fledglings have a high pitched begging call. It vies with rifleman for the title of New Zealand’s smallest bird, with both weighing about 6 g. Notornis 30: 137-165. After hatching, the cuckoo chick ejects all grey warbler eggs and/or nestlings from the nest and is raised alone. Grey warblers are locally abundant in suitable habitats throughout New Zealand. The abdomen is off-white with a slight yellow tinge. The male's song often starts with a series of three squeaks and builds into a distinctive long plaintive wavering trill that rises and falls. They are one of few native passerines to have benefitted from human modification of the landscape. The 3 to 6 eggs, each laid 2 days apart, are pinkish-white with fine reddish-brown speckles all over. [7] As such, a eastern-facing entrance would indicate a poorly season brought on by western winds; in contrast, a northern-facing entrance would suggest a pleasant season ahead.[6]. The grey warbler is a relatively inconspicuous grey bird that flits about the canopy of the forest but its call permeates the forest and takes the edge off a hard uphill slog for any attentive tramper. — (Grey Warbler.) Of course, the work that DOC does in plant and animal pest control increases the quality of whole ecosystems, and therefore contributes to the ongoing success of many common birds like the grey warbler, as well as ensuring the ongoing survival of our rarer more susceptible species. Note small yellow spot in front of the eye. The nest is a hanging enclosed dome, usually found in the outer branches of the canopy, 2-4 m off the ground. Grey warblers are often seen flying short distances, moving between branches in the canopy.