Dragonfly Environmental


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Rosenberg’s Goanna

lizardRosenberg’s Goanna is a monitor lizard and is considered as one of the world’s distinct species. They actively search for prey and rely on detection of scents to facilitate their search. While hunting, they walk with a characteristic swinging pace holding the snout near the ground while flicking in out their long forked tongue and transferring odors to sensory organs.

This lizard reaches up to a meter and a half in length. The upper part of its body is dark grey, spotted finely with white or yellow. It has blackish cross bands from its neck to the tail end. The pairs of thin, regular bands around the overall length of its tail is a unique feature which sets it apart from the common Lace Monitor Vuranus varius, whose bands towards the tail tip are lighter and wider. Rosenberg’s Goanna has finely, also has distinct barred lips while the Lace Monitor has wider bands around the snout. There is a pale-edge black stripe running from the eyes across its ears and onto the neck.

Rosenberg’s Goanna can be found in health, woodland and open forest. They normally feed on birds, eggs, carrion, small mammals and reptiles. They need large areas of habitat and shelters on rock crevices, hollow logs and in burrows that they may dig themselves or may use burrows of other species. When chased, they run around the ground. Lace Monitor when pursued on the other hand climbs trees.

Rosenberg’s Goanna can lay up to 14 eggs in a termite mound and their hatchlings dig themselves out of the mound. They are generally slow moving and are more likely to be seen when the climate is hot on flatlands.

One of their biggest threats they are faced with include loss of habitat and fragmentation as land is cleared and used for agricultural, residential and industrial developments. They are also killed by moving vehicles. They are also a prey to dogs and cats.

Because Rosenberg’s Goanna is one of the endangered species in the world today, targeted strategies for managing them were developed by many organizations that aim to protect and conserve wildlife. They provide some measures to ensure that these animals are protected against predators and other situations that may put their lives to danger.

In areas where the species occur, dogs and cats should be restrained and kept indoors. Fallen timber and termite mounds that are critical habitat component to Rosenberg’s Goanna should be retained especially in areas supporting this species. Woodland, heath and forest remnants should also be retained in the known distribution of the species.

Their habitat should not be fragmented for the purpose of clearing, creating roads and other developments. The remnant populations should stay linked or connected to each other. In the event remnants lose the connective links, re-establishing it should be done by revegetating sites that will serve as stepping stones for distribution.

To lessen instances of road kills, road upgrades or new roads in areas supporting habitat should construct elevated sections to facilitate the lizards passing underneath. As rare as they may be, people, especially those living in areas where the Rosenberg’s Goanna occur should ensure that they provide a suitable and safe living environment for this species.

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Sydney Ports – Protecting Endangered Wildlife at Enfield

golden bell frogThe Green and Golden Bell Frog was once one of the most common frog species on Australia’s south-eastern coast, thriving in large, permanent, open-water swamps or ponds that have a variable water level and dense surrounding vegetation.

However, in recent times factors such as habitat loss and introduced predators have seen their populations decline to the point where they are now listed nationally as vulnerable and in NSW as endangered.

Plans for the Sydney Olympics site at Homebush were amended when the frogs were discovered there, leading to the relocation of the tennis courts and the establishment of new habitats for the frogs.

(Pictured right: The Enfield-Chullora site showing habit areas, frog corridors and ponds.)

Now, with small numbers of the Green and Golden Bell Frog known to be in the Enfield-Greenacre area, just south of Homebush, similar protection efforts are being incorporated into construction of Sydney Ports’ Intermodal Logistics Centre.

Working with the wetland management and restoration group Dragonfly Environmental, Sydney Ports is establishing and will be responsible for managing, a two hectare habitat of ponds, foraging areas, shelters and corridors designed as a refuge for frogs migrating to and around the Enfield-Greenacre area.

Sydney Ports Senior Project Manager, Bruce Royds says the development of the Frog Habitat Creation Area (FHCA) at Enfield will greatly assist in the conservation of Green and Golden Bell Frog populations.

“Sydney Ports has worked closely with experts in the field to develop a habitat management plan designed to ensure optimum water levels in the ponds, that the surrounding environment is kept free of weeds and unwanted vegetation and that frog movement corridors are maintained to encourage interconnectivity between colonies,” Mr Royds said.

“Secure breeding sites for the frogs are scarce, so we are establishing an environment that will mimic, as closely as possible, their natural habitat.”

“A critical part of this process will include artificially raising and lowering water levels in the ponds to emulate nature’s sporadic rainfall and the resulting cycles of full water and drying out.”

“Ultimately, we are working to create a habitat for the Green and Bell frogs that will encourage breeding, foster survival and see their numbers in the Enfield-Greenacre area increase to the point where natural migration patterns in and around the site are re-established and become the norm.”

habitat cronulla habitat cronulla 1 habitat cronulla 2

Cronulla Industrial Estate for Australand 2006-2007. Bitou bush and other noxious and environmental weeds were eradicated from works site. Works included planting of 330,000 plants in stormwater detention facilities and on dune areas. Works included creation of Green and Golden Bell Frog Habitat at the site. Work was completed within 2 months to specifications and within budget.

GGBF habitat enfield DFE

Enfield

Dragonfly Environmental wetland management and restoration groupis working for Sydney Ports in establishing and managing, a two hectare habitat of ponds, foraging areas, shelters and corridors designed as a refuge for frogs migrating to and around the Enfield-Greenacre area.

Dragonfly Environmental planted the Frog breeding areas (designed by Arthur White) and is continuing to maintain the habitat areas. It’s a great project and the Dragonfly Team are proud to be caring for such important habitat.


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Doonside Reserve and Breakfast Creek for Mirvac Homes and Blacktown City Council 2004 – 2007

Mia 11

Dragonfly Environmental conducted bush regeneration and hard works to restore and maintain the largest remaining stand of the Endangered Cumberland Plain Ecological Community in the Blacktown City Council Area, which comprises of 13 Hectares.  This Involved:

  • maintenance of the riparian zone and terrestrial areas of Breakfast Creek;
  • the translocation of the endangered Cumberland Plain Land Snail;
  • installation of 40,000 plants;
  • construction of 800 metres of fencing and 900 metres of pathways through the reserve;
  • installation of 1km of bollards;
  • design and placement of interpretive signage for the Reserve.

A Weed Management Report was also compiled for the site to outline targets and monitoring requirements that will be carried out by Dragonfly Environmental.


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Oldest Australian Bird!

A Fossil of a bird similar to a modern Egret has been recently discovered in Australia.  Over 1 millions years old the fossil shows the foot prints and landing marks of the bird as it glided in on the muddy ancient shore.  For more information on the fossil seen the link at the end of this page.

A million years after that birds walked the Earth Dragonfly Environmental

is working on projects to rehabilitate and re-create habitat for today’s Egrets and waterbirds.. Out work at Port Botany has include the creation of large Saltmarshes which are being visited by Migratory birds – such as the Saltmarsh creation and rehabilitation at Port Botany.

Migratory Bird Roosting Island

Recent works include the upgrading of the main island that was created for migratory birds to roost on.  High-tide roosting islands, away from disturbance, are of high importance to wading birds.  During September (before the birds come back!) Dragonfly Environmental has worked with Shore Contracting  http://www.shorecontracting.com.au/ to build up the centre of the Island by moving 11,000m3 of crushed sandstone over the sensitive mudflats and onto the Island.

migratory bird

http://www.sydneyports.com.au/corporation/news/e-current_newsletter/e-current_december_2009/penrhyn_estuary_-_road_to_recovery

Plus Dragonfly’s works in Wetlands rehabilitation and Creation in and around Sydney are bringing back the birds.  Including Noxious aquatic weed removal in wetlands throughout Sydney particularly Ludwigia peruviana.

http://miadalbyball.wordpress.com/2011/03/18/559/

So over 1million years after these ‘Egret’ type fossil foot prints were laid down we can continue to celebrate the presents of our Winged relations in the skies and on the Beaches and in the Wetlands.

For more on our projects see http://www.pittwateronlinenews.com/dragonfly-environmental-profile.php


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Cronulla Industrial Estate for Australand 2006-2007

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Dragonfly Environmental completed works at a Cronulla Industrial Estate for Australand within a two month period in 2006 and 2007. Works involved the eradication of Bitou bush and other noxious and environmental weeds from the work site, as well as the planting of 330,000 plants in stormwater detention facilities and on dune areas.


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Fern Creek and Narrabeen Creek Detention Basin 2004 – 2008

Mia 9

Dragonfly Environmental were contracted by Pittwater Council to conduct works which included over 48 000m2 of riparian zone restoration and landscaping in the Warriewood Valley. This comprised of soil amelioration, mulching and planting works. Planting included 220,000 tube stock, 10,000 6-8 inch pots, 300 x 25L, 250 x 75L and installation of 7 x 3m Cabbage Tree Palms. Dragonfly Environmental is currently managing noxious and environmental weeds in a section of Fern Creek.


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Cooks Park Dune Restoration Kyeemagh for Sydney Water and Water Delivery Alliance 2009 – 2010

Mia 8

Dragonfly Environmental conducted works for Sydney Water and Water Delivery Alliance which involved the installation of over 100,000 plants as part of the dune restoration plan at Cooks Park, Kyeemagh.  The dune restoration site and erosion control materials were also bush regenerated and maintained by Dragonfly Environmental for six months.


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Coolibah Reserve Riparian Rehabilitation and Wetland Design, planting and maintenance 2010 – 2011

Mia 6

Working for Rockdale City Council during the 2010 – 2011 period, Dragonfly Environmental were involved in the creek bank restoration and were responsible for all the riparian planting and the on-going maintenance.  The wetland and creek works have been recognised by the Sydney Metropolitan Catchment Management Authorities and others as exceptional.

Mia 6A

Dragonfly Environmental also designed a wetland for Coolibah Reserve transforming a weedy puddle into a wetland dominated by native aquatic plants and surrounded by terrestrial native species.


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Bush Regeneration at Manly and Curl Curl Lagoon for Warringah Council 2010 – 2011

Mia 5

Working for Warringah Council, Dragonfly Environmental undertook bush regeneration that involved the suppression of noxious and environmental weeds at 12 sites. These sites comprised of estuarine lagoons, creek-line corridors, riparian and terrestrial areas. The works involved 1800 bush regeneration hours for the contract and the supply and installation of 2500 plants.