Grey warblers are entirely insectivorous, feeding mainly on caterpillars, flies, beetles, moths and other small invertebrates. Use available access ways to get to the beach. Begging calls are mimicked by their brood parasite, the shining cuckoo, while in the nest and as a dependent fledgling. The grey warbler (Gerygone igata), also known by its Māori name riroriro or outside New Zealand as the grey gerygone, is an insectivorous bird in the family Acanthizidae endemic to New Zealand. No egg rejection behaviour is shown by the grey warbler. The female shining cuckoo removes a single egg from the clutch, replacing it with her egg. 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. 1983. Nestlings and fledglings have a high pitched begging call. Grey warbler/riroriro are not threatened, so DOC doesn't actively work with them. The grey warbler is New Zealand’s most widely distributed endemic bird species, based on the number of 10 x 10 km grid squares it occupied over the whole country in a 1999-2004 survey. Anderson, M.G. After hatching, the cuckoo chick ejects all grey warbler eggs and/or nestlings from the nest and is raised alone. Th… Evolutionary interactions of brood parasites and their hosts: recognition, communication and breeding biology. Adult females have variable amounts of black on the throat and are often paler than males. They are one of few native passerines to have benefitted from human modification of the landscape. The young are paler with no hint of yellow and have brown eyes.  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.. The male is not involved in nest building or incubation, but helps to feed nestlings and fledglings. Grey warblers are common throughout New Zealand's main islands and many off-shore islands, but are absent from open country and alpine areas. This is encapsulated in the whakatauki (Maori Proverb): "Tiakina nga manu, ka ora te ngahere Ka ora te ngahere, ka ora nga manu", "Look after the birds and the forest flourishes. The nest is a hanging enclosed dome, usually found in the outer branches of the canopy, 2-4 m off the ground. ; Brunton, D.H.; Hauber, M.E. Grey warbler (Gerygone igata) was the surprise recipient of the title of New Zealand's best-loved bird in 2007. Pairs stay in their territories year round, although they are not defended during the non-breeding season. DOC priorotises its work to protect the rarer species, in the context of their overall environment. http://en.wikipedia.org/wiki/Grey_Gerygone. Volunteer to control predators and restore bird habitats. Only take dogs to areas that allow them, and keep them under control. The grey warbler/riroriro are found throughout New Zealand. Grey warblers mainly feed upon spiders, insects and their larvae. Adult. Call 0800 DOC HOT (0800 362 468) immediately if you see anyone catching, harming or killing native wildlife. Grey warblers are abundant and widespread and no threat to their long term existence is apparent. It vies with rifleman for the title of New Zealand’s smallest bird, with both weighing about 6 g. Territorial song (tomtit & silvereye in background), Territorial song (house sparrows in background). They have a very fast wing beat, almost hovering at times while foraging. PhD, Massey University. 2007. The song is louder than expected, given the bird’s size. Grey warbler song (MP3, 527K)01:26 – Territorial call, flying between perches, answering a tape recorder.