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Rufous Bristlebird Version Has Been Prepared for Web Publication #49 This Action Statement was first published in 1993 and remains current. This Rufous Bristlebird version has been prepared for web publication. It Dasyornis broadbenti retains the original text of the action statement, although contact information, the distribution map and the illustration may have been updated. © The State of Victoria, Department of Sustainability and Environment, 2003 Published by the Department of Sustainability and Environment, Victoria. Rufous Bristlebird (Dasyornis broadbenti) Distribution in Victoria (DSE 2002) 8 Nicholson Street, (Illustration by John Las Gourgues) East Melbourne, Victoria 3002 Australia Description and Distribution not well understood. The Rufous Bristlebird (Dasyornis Rufous Bristlebirds are often found in coastal This publication may be of thickets, and in the Otways they occur in assistance to you but the broadbenti, McCoy 1867) is a medium-size forested valleys generally a short distance State of Victoria and its primarily ground-dwelling songbird (23-27 employees do not guarantee cm long). It is predominantly dark grey- inland (Emison et al. 1987). that the publication is brown above, with a long tail, rich rufous There are some inland records, including without flaw of any kind or nape and ear coverts, scalloped grey breast, resident populations at Kawarren is wholly appropriate for a pale patch before and around the eyes approximately 40 kms from the coast, and in your particular purposes and a cinnamon centre on the wing and heavily vegetated gullies near Timboon. The and therefore disclaims all rump. It has a loud, distinctive call. bird may have occurred a similar distance liability for any error, loss inland at Jancourt, west of the Otways, prior or other consequence which Nests are built close to the ground, in to widespread vegetation clearance in the may arise from you relying tussocks or low shrubs. The Rufous on any information in this Bristlebird feeds primarily on ground- Heytesbury area in the 1960s. Rufous publication. dwelling invertebrates, although details of Bristlebirds may frequent gardens near thick its diet are not well known. natural vegetation. ISSN 1448-9902 There are three subspecies of the Rufous Bristlebird. The nominate subspecies D. b. broadbenti is found in a narrow coastal strip from Anglesea west to about the Glenelg River, with a substantial gap in distribution near Warrnambool. This gap effectively creates two distinct populations of Rufous Bristlebirds in Victoria. The bird is a weak flyer and its ability to disperse is Conservation Status regimes, and excessive removal of habitat around Current status human habitation. Garnett (1992) Rare DCE (1991) Rare Management Issues SAC (1991) Threatened Ecological Issues Specific to the Taxon The Rufous Bristlebird has been listed as a threatened taxon The essential components of suitable habitat are unclear. on Schedule 2 of the Flora and Fauna Guarantee Act 1988. Rufous Bristlebirds occur in floristicially dissimilar habitats, such as coastal heaths and wet forest gullies, though all Reasons for Conservation Status habitats occupied contain patches of very dense vegetation. All species and subspecies of bristlebirds are threatened Surveys and research are necessary to define the critical habitat nationwide (Garnett 1992). Outside Victoria, D. b. whitei is of the Rufous Bristlebird, including the optimal post-fire found from about the Glenelg River west along the coast of successional stage. South Australia to the Coorong and it is classified as Wildfires probably pose a direct threat. Following the 1983 insufficiently known. The Eastern Bristlebird Dasyornis bushfires, recolonisation in the Aireys Inlet area has been slow brachypterus is vulnerable and the Western Bristlebird D. (Reilly 1991a & b). Despite roughly 250 km of coastal habitat longirostris is endangered. D. b. litoralis from coastal south- being contained in parks and reserves of different status, it is western Western Australia is extinct. not known if these areas are being managed appropriately for The Rufous Bristlebird's range in Victoria has decreased the taxon. because of loss of habitat through clearing for agriculture Possible threatening processes in the coastal Otway area and coastal urban development causing fragmentation of include the reduction and fragmentation of suitable habitat by: habitat and extinctions of local populations. Continued • clearing for residential development; the fire coastal development is likely to result in further habitat protection measure of clearing large areas around fragmentation. Because of its ground feeding and nesting houses; behaviour, the Rufous Bristlebird is vulnerable to • slashing all unoccupied heathland each spring; and introduced predators such as Red Foxes (Vulpes vulpes) • controlled burning to remove undergrowth and and Cats (Felis cattus). ground litter, both of which are essential for the birds. Wildfire or inappropriate burning regimes are a threat All species of bristlebird are weak fliers and probably have throughout the Rufous Bristlebird's range, and may further poor dispersal capabilities (Smith 1977, Brouwer & Garnett reduce habitat availability and/or cause local extinctions. 1990). They are slow to recolonise areas from which they have Frequent burning of its habitat in south-west Western been previously eliminated (Smith 1977, Reilly 1991a & b, Australia probably led to its extinction in that state (Garnett Garnett 1992). Knowledge of the Rufous Bristlebird's ability to 1992). disperse through modified habitats is needed to implement In its final recommendation the Scientific Advisory projects involving habitat creation and corridor development. Committee (1991) determined that the Rufous Bristlebird is: Rufous Bristlebirds are known to sometimes utilise modified • in a demonstrable state of decline which is likely environments, including feeding in well-vegetated gardens to result in extinction; and adjacent to natural habitat and nesting in introduced Pampas • significantly prone to future threats which are Grass. likely to result in extinction. Cats and Red Foxes may be important predators because Rufous Bristlebirds are ground-dwelling. In areas where Major Conservation Objective housing density within the Rufous Bristlebird's range is high, The first objective is to confirm that there are at least 1000 the numbers of these potential predators of Rufous Bristlebird Rufous Bristlebirds in each of the populations either side of eggs and young are also likely to be high as are those of Black the Warnambool gap in distribution. While there is no such Rats (Rattus rattus), another possible predator. thing as a fixed minimum viable population for a species The effects of weed invasion and rabbit grazing on the habitat (Shaffer 1990), a total of 2000 birds should provide an requirements of the Rufous Bristlebird are unknown, although acceptably low extinction risk (Franklin 1980, Shaffer 1981). they may be significant in some areas. The major conservation objective then is to prevent further decline in population density and further fragmentation of Wider Conservation Issues Rufous Bristlebird habitat and populations. The requirements of threatened sympatric, or partially This will be accomplished by: sympatric, taxa such as the rare Ground Parrot (Pezoporus • identifying the ecological requirements of the wallicus), endangered New Holland Mouse (Pseudomys species; novaehollandiae), rare Smoky Mouse (Pseudomys fumeus), • identifying gaps in suitable habitat and rare Swamp Antechinus (Antechinus minimus) and establishing habitat corridors between populations endangered Metallic Sun-orchid (Thelymitra epipactoides) will to allow dispersal to occur, particularly between need to be considered in the development of appropriate fire coastal and inland populations; and regimes. • minimising the impact of threatening processes Restoring and retaining vegetation along valleys extending such as introduced predators, inappropriate fire inland from the coast, and providing habitat links along the 2 foreshore of coastal towns such as Warrnambool, Portland Management Action and Port Fairy, will provide habitat for a number of other species of flora and fauna. Previous Management Action Social and Economic Issues During 1991 proposed development plans at Loch Ard Gorge The social and economic impacts of conserving the Rufous in the Port Campbell National Park were modified to take into Bristlebird's habitat are moderate and small respectively. account the value of the area for Rufous Bristlebirds, identified The main social issue concerns the fire protection measure after surveys. The proposed car park has been re-sited and of clearing large areas around houses, slashing all reduced in size, and has been installed with minimum loss of unoccupied heath and burning to remove undergrowth and habitat. litter. An interpretative sign, outlining the biology and ecology of the Approximately 250 km of coastal habitat of the Rufous Rufous Bristlebird, has been designed and will be placed near Bristlebird lies within existing parks or reserves, where the Loch Ard Gorge car park. This is one of only a few social and economic impacts will be minimal. At Loch Ard locations where Park visitors can easily see a threatened animal Gorge in the Port Campbell National Park, car park in Victoria. development was planned to minimise loss of Rufous Bristlebird habitat. There may be social and economic Intended Management Action values to consider in the future as demand for access and The following
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