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Hemiphlebia Damselfly Version Has Been Prepared for Web Publication #46 This Action Statement was first published in 1993 and remains current. This Hemiphlebia Damselfly version has been prepared for web publication. It Hemiphlebia mirabilis 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. Hemiphlebia Damselfly (Hemiphlebia mirabilis) Distribution in Victoria (DSE 2002) 8 Nicholson Street, East Melbourne, Description and Distribution Victoria 3002 Australia The Hemiphlebia Damselfly (Hemiphlebia Additionally, it was discovered near Mount mirabilis Selys 1868 Odonata: William in Tasmania during 1992 (Trueman This publication may be of Hemiphlebiidae), is a small insect with a et al. 1992) and on Flinders Island in Bass assistance to you but the wingspan of 22 mm and total length of 24 Strait (Endersby 1993). The first Victorian State of Victoria and its employees do not guarantee mm (Davies 1985). It is bright metallic records came from floodplain lagoons in the that the publication is green with white anal appendages (Wells et Goulburn Valley at Alexandra and in the without flaw of any kind or al. 1983). The species was originally middle to upper course of theYarra River at is wholly appropriate for described by Selys in 1868 and more fully the turn of the century (Wells et al. 1983, your particular purposes in 1877 (Yen et al. 1990). Davies 1985). and therefore disclaims all This damselfly is of unusual scientific After continued but declining numbers of liability for any error, loss interest as it exhibits primitive and unique sightings, searchers failed to find the or other consequence which structural features in both adult and larval Hemiphlebia Damselfly on the Goulburn may arise from you relying on any information in this stages (Wells et al. 1983), and has unusual River floodplain in the late 1970s. By this publication. display behaviour (Sant & New 1988). The time, the original habitat had been largely Hemiphlebia Damselfly is taxonomically degraded by agriculture, in particular, the ISSN 1448-9902 isolated, being placed in a superfamily effects of livestock and changed drainage (Hemiphlebioidea) of its own. It has been patterns (Trueman et al. 1992). described as a 'living fossil'. In 1977, a single specimen was captured at The Hemiphlebia Damselfly is endemic to Wilsons Promontory National Park, Victoria. Australia and was first recorded from Port However, its significance was not recognised Denison, northern Queensland (Selys 1869). (Sant & New 988). A viable colony was However, as subsequent discoveries have found at Wilsons Promontory in 1985 by been confined to central and southern Davies (1985) and the species has since been Victoria, the Queensland record is thought recorded as being locally common at two to have been an error (Wells et al. 1983). sites in the park: Cotters Lake and a small swamp adjacent • significantly prone to future threats which are likely to Five Mile Road. The habitat comprises seasonally to result in extinction; and flooded heathland swamps with emergent sedges (Sant & • very rare in terms of abundance and distribution. New 1988). In January 1992, the Hemiphlebia Damselfly was Major Conservation Objectives rediscovered in central Victoria in a billabong on private The major conservation objectives are to: property beside the Yea River at Yea. Subsequent searches • conserve and appropriately manage habitat of the of the area showed the species also survives on the Hemiphlebia Damselfly; Goulburn River floodplain near Alexandra (Trueman et al. • rehabilitate degraded habitat where necessary in 1992). order to maintain and enhance the known The Hemiphlebia Damselfly is a univoltine (breeds once a populations of Hemiphlebia Damselfly; year) species. The adults are present from late November to • survey previously known, currently known and late February and spend large amounts of time resting on potential habitats of Hemiphlebia Damselfly; vegetation; they are thought to be weak fliers (Yen et al. • determine the extent of suitable habitat areas and 1990). Female damselflies probably insert eggs into aquatic remaining populations of the Hemiphlebia Damselfly, vegetation (Sant & New 1988). The larvae are predators on especially on public land; a wide range of small invertebrates (Yen et al. 1990). • investigate the ecological requirements of the The adult damselflies are more commonly found away Hemiphlebia Damselfly; and from water rather than over it (Trueman et al. 1992). It has • formulate and implement appropriate management been suggested that the eggs of Hemiphlebia can withstand which aims to conserve and enhance populations of drought. The habitats at Wilsons Promontory may dry out the Hemiphlebia Damselfly. in summer (Davies 1985, Sant & New 1989). Management Issues Conservation Status Current Status Ecological Issues Specific to the Taxon Wells et al. (1983) Endangered worldwide Habitat conservation is paramount to the survival of the DCE (1991) Vulnerable in Victoria remaining populations of Hemiphlebia Damselfly in both SAC (1991) Threatened. central and southern Victoria. More information is required on the distribution, biology and ecology of the Damselfly to assist The Hemiphlebia Damselfly has been listed as a threatened management. taxon on Schedule 2 of the Flora and Fauna Guarantee Act Populations at Wilsons Promontory lie entirely within the 1988. national park and, with appropriate habitat management, would appear more secure than those in the Goulburn Valley Reasons for Conservation Status which are on private land. Activities that affect the habitat of Determination of the current distribution and abundance of the damselfly, such as fire, may be catastrophic to isolated Hemiphlebia Damselfly was given the highest priority populations in the short term. The long-term effects of such among conservation projects on the order Odonata at the events are unknown. An ecological burning program is inaugural meeting of the International Union for conducted in heath adjacent to the Five Mile Road swamp. This Conservation of Nature and Natural Resources Odonata program may need to be specifically modified to achieve the Specialist Group (IUCN) in 1980 (Moore 1982). damselfly conservation objectives. Within Victoria, population decline of the Hemiphlebia A fuel reduction burn, which burnt much of the Five Mile Road Damselfly in the Goulburn and Yarra Valleys has occurred swamp in April 1987, was responsible for reducing the area of with changes in land use. Many of the vegetated floodplain suitable habitat, and probably resulted in the low numbers lagoons suitable for the damselfly have been severely recorded for the following two flight seasons (Sant & New altered as a result of land clearing, wetland drainage, river 1988, Yen et al. 1990). In early 1992, numbers were still low in regulation and cattle grazing (Yen et al. 1990). the burnt section, but relatively high in unburnt areas of the The known populations at Wilsons Promontory are isolated swamp (T. New pers comm.). from each other and highly localised (Yen et al. 1990). Populations of the damselfly may only be temporarily reduced Highly localised populations are susceptible to local by fire and recover in a few years. The Five Mile Road swamp, extinctions through inappropriate management regimes or which supported the largest known population of the catastrophic events. damselfly prior to the 1987 fire, had been burnt in 1951 and Davies (1985) estimated population levels of around 100 per again in 1957, while other nearby swamps of a similar nature 10 m2 in sheltered patches of reeds, with similar numbers (not known to support significant numbers of Damselflies) recorded in the following two flight seasons. were not burnt. Cotters Lake, on the other hand, which also In its final recommendation, the Scientific Advisory supports a significant number of Hemiphlebia Damselflies, has Committee (1991) has determined that the Hemiphlebia remained unburnt for over 40 years (J. Whelan pers comm.). Damselfly is: The known populations at Wilsons Promontory do not appear • in a demonstrable state of decline which is likely to be threatened by current management practices, such as to result in extinction; control burning, ecological burns and mowing of fire-breaks. 2 Fire occurs naturally in the area from lighting strikes. been successful in allowing regeneration of vegetation in the Furthermore, regular rotational fuel reduction burning of swamp (T. New pers. comm.). areas surrounding Hemiphlebia Damselfly habitat may 1988 A report on the biology and conservation of the promote vegetation succession, therefore maintaining Hemiphlebia Damselfly was prepared (Sant & New 1988). damselfly numbers (T. New pers. comm.). Conversely, 1992 Cattle grazing was phased out of Wilsons Promontory cessation of the ecological burning program of the heath National Park. surrounding the freshwater swamps will eventually lead to decline of the heath and its replacement with dense Coast Intended Management Action Tea-tree (Leptospermum laevigatum) scrub, which could- Population and Habitat Inventory alter the wetland ecosystem and thereby affect damselfly • La Trobe University, with assistance from CNR where populations. appropriate, to undertake survey and assessment of At the Five Mile Road swamp, damselflies congregate in freshwater swamps on Wilsons Promontory and
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