Crescent Honeyeater

There are records of scattered populations of the crescent honeyeater on the Central Tablelands, the Mid North Coast, and in the Hunter Region of New South Wales, and it is widespread in the areas of New South Wales south of Dharug National Park and east of Bathurst. In Victoria it is widespread across an area from the NSW border south west to Wallan with scattered populations recorded further west. It is widespread in Tasmania, except in the northeastern part of the state where it is more sparsely distributed. It is restricted to sclerophyll forest in eastern South Australia, where isolated populations have been recorded in the Mount Lofty Ranges and on Kangaroo Island. Local influxes have occurred outside its normal range in response to changes in habitat. Recorded population densities range from 0.3 birds per hectare (0.12/acre) near Orbost, to 8.7 pairs per hectare (3.5/acre) in Boola Boola State Forest, also in Victoria. While the crescent honeyeater occupies a wide variety of habitats including coastal heath, rainforest, wet sclerophyll forest, mountain forest, alpine woodland, damp gullies and thick tea-tree scrub, they all demonstrate its preference for dense vegetation. It has been frequently recorded in wet sclerophyll forest dominated by eucalypts and with a thick mid-story and understory of shrubs such as blackwood, silver wattle, Cassinia, Prostanthera, and Correa. At higher altitudes it occurs in alpine heathlands and in woodlands of stunted eucalypt or conifers. The movements of the crescent honeyeater within its range are incompletely known. There is widespread evidence of seasonal migration to lower altitudes in cooler months, yet a proportion of the population remains sedentary. Autumn and winter migration to the lowland coastal areas is seen in southern Tasmania, where it is not unusual to see it in urban parks and gardens, as well as in Gippsland, and the New South Wales Central and South Coast. In the Sydney region, some birds appear to move down from the Blue Mountains to Sydney for the cooler months, yet others remain in either location for the whole year. It is only seen in alpine and subalpine areas of the Snowy Mountains in warmer snow-free months (mainly October to April). Other populations of crescent honeyeaters follow a more nomadic pattern of following food sources; this has been recorded in the Blue Mountains and parts of Victoria.

While the population numbers and distribution are sufficient for the crescent honeyeater to be listed as of Least Concern for conservation, numbers have fluctuated significantly over the past twenty-five years and currently seem to be in decline. The threats to the crescent honeyeater include habitat destruction, as the alpine forests in which it breeds are being reduced by weed infestations, severe bushfires, drought and land-clearing. The crescent honeyeater's dependence on long-term partnerships and breeding territories means that breeding success is threatened by the death of one partner or the destruction of habitual territory. The influx of birds to urban areas also places them at increased risk of accidents and predation. Cats have been recorded preying on crescent honeyeaters, and at least one guide urges cat owners to keep their cats in enclosures when outside the house or to provide a stimulating indoor environment for them.