especially in much of the Northern Territory, Queensland and New South Wales. However, in many places (generally south of the Tropic of Capricorn), populations may be present or absent at different times of the year, although this appears to result from nomadic, rather than seasonal, migratory movements. Around Wellington in central New South Wales, birds were recorded over winter months, and were more common in autumn around the Talbragar River. Birds were present all year round near Inverell in northern New South Wales, but noted to be flying eastwards from January to May, and westwards in June and July. In Jandowae in southeastern Queensland, birds were regularly recorded flying north and east from March to June, and returning south and west in July and August, and were absent from the area in spring and summer. They live throughout rainforest, dry sclerophyll (Eucalyptus) forest, open woodland, Pandanus thickets, paperbarks, mangroves, watercourses, and wetter areas of semi-arid regions, as well as parks, gardens, and golf courses in urban areas. The understory in eucalypt-dominated woodland, where the blue-faced honeyeater is found, is most commonly composed of grasses, such as Triodia, but sometimes it is made up of shrubs or small trees, such as grevilleas, paperbarks, wattles, Cooktown ironwood (Erythrophleum chlorostachys) or billygoat plum (Terminalia ferdinandiana). One study in Kakadu National Park found that blue-faced honeyeaters inhabited mixed stands of eucalypts and Pandanus, but were missing from pure stands of either plant. Behaviour The social organisation of the blue-faced honeyeater has been little studied to date. Encountered in pairs, family groups or small flocks, blue-faced honeyeaters sometimes associate with groups of yellow-throated miners (Manorina flavigula). They mob potential threats, such as goshawks (Accipiter spp.), rufous owls (Ninox rufa), and Pacific koels (Eudynamys orientalis). There is some evidence of cooperative breeding, with some breeding pairs recorded with one or more helper birds. Parents will dive at and harass intruders to drive them away from nest sites, including dogs, owls, goannas, and even a nankeen night-heron (Nycticorax caledonicus). A study published in 2004 of remnant patches of forest in central Queensland, an area largely cleared for agriculture, showed a reduced avian species diversity in areas frequented by blue-faced honeyeaters or noisy miners. This effect was more marked in smaller patches. The study concluded that conserved patches of woodland containing the two aggressive species should be larger than 20 ha (44 acres) to preserve diversity. Social birds,