Dragonfly Environmental

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Penrhyn Estuary – Road to Recovery

0912_saltbush_lgeAfter years of pressure from mangrove encroachment, contaminated surface and ground waters as well as increased disturbance from public recreational usage, the rehabilitation and enhancement of Penrhyn Estuary is beginning to take shape. As part of the Port Botany Container Terminal Expansion Project, Sydney Ports has committed to securing Penrhyn Estuary for locally significant migratory shorebirds. The commitment will see $8 million spent to rehabilitate and expand Penrhyn Estuary. Due to decline or removal of other available habitat, Penrhyn Estuary has become the only viable feeding and roosting habitat site for locally significant shorebirds on the northern side of Botany Bay. As part of the habitat enhancement for the Estuary, 2.4 ha of additional saltmarsh habitat will be created and planted with a mix of saltmarsh species.

The past month saw the planting of 124,896 saltmarsh plants within Penrhyn Estuary. Saltmarsh is an Endangered Ecological Community within NSW and is protected under the Threatened Species Conservation Act 1995. It is an important component within the estuary as it plays a key role in stabilising banks, filtering surface run off, reducing nutrients and provides a habitat for shorebirds and other fauna that use the estuary. The saltmarsh species mix that was planted in the Estuary will have greater diversity than the existing community and will comprise the species Sarcocorina quinqueflora, Sporobolus virginicus, Isolepis nodosa, Suaeda australis, Samolus repens, Juncus kraussii and, Triglochin striatium.

The plants have been propagated from seed or stem pieces collected from within Penrhyn Estuary and Botany Bay. Saltmarsh seed/stem piece collection was undertaken between March and May 2008 and January and May 2009 with the seeds / pieces being propagated in two nurseries in Sydney, Toolijooa in Dural and Australian ECOFLORA in Ebenezer.

In addition to the propagation of new plants, an area of 0.2 ha of saltmarsh was located on the edge of the dune, west of Floodvale Drain and was removed to create intertidal habitat. 0.1ha of Sarcocornia and Sporobolus from this area has been transplanted into a 0.4ha area in the upper reaches of Penrhyn Estuary, to prevent it being lost as part of the landform changes. The transplanted Sarcocornia and Sporobolus species have shown initial success with the Sarcocornia seeding and the Sporobolus showing new growth.

The remaining saltmarsh on the western and eastern side of Floodvale Drain is being maintained as part of Dragonfly Environmental’s bush regeneration activities within Penrhyn Estuary.

Prior to construction, Penrhyn Estuary was dominated by mangroves that colonised the shorebird habitat, out-competing the saltmarsh species. Penrhyn Estuary contained about 1.4ha of Saltmarsh comprising of the species Sporobolus quinqueflora, Suaeda australis, Isolepis nodosa, Juncus Kraussii and Juncus acutus.

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

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PNHA Members and Friends

Can you help?

We have set up a petition to conserve some important bushland on the Warriewood escarpment behind Mona Vale, now threatened with rezoning for residential development.

A map of the bushland areas is attached. It shows how critical is this bushland at 122 Mona Vale Rd.

Please sign to help our campaign to keep our bushland areas connected and to help flora and fauna survive residential development.

Also look at our You Tube film: http://www.youtube.com/watch?v=E2Y4PSaYPOs

Please forward this email to friends, family and staff.

A map of the bushland areas is attached and shows how critical is  this bushland at 122 Mona Vale Rd for animals moving between Katandra Bushland Sanctuary and Ingleside Chase Reserve, once a fauna overpass is built on Mona Vale Rd and Ingleside land release occurs.

The Committee

Pittwater Natural Heritage Association

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Scotland Island Floating Landcare


Dragonfly Environmental as part of the Scotland Island Floating Landcare activity Friday 25th October.

A great group of people already registered – if you want to know more about this day or upcoming events call the office 02 9918 4486 or email rebecca@dfe.net.au

What’s involved:

Meeting place and time

8:40 am Church Point Ferry Wharf.  It is a public ferry and it leaves at 8:55am so please be early.

How to get to the meeting point:

Drive to Church Point along Old Pittwater Rd (coming from the south) or along McCarrs Creek Rd (if coming from the north).

There is a car park at Church Point (Church Point Reserve). $3/hr pay with card or coin.  (finish 2:30pm).  Alternatively there may be some free parking along McCarrs Creek Rd or Eastview St however it will require a walk back to the Church Point Wharf and some time to do this.

Meeting place and time (for those meeting us on the Island)

9.10 am meet at Catherine Park –  please to help us with some of the equipment for the day.  Many hands do make light work.


Please be prepared for both hot or cold weather. If the weather looks really wet in the morning and you are unsure if the day will proceed or if an emergency comes up and you can no longer make it please give me (Vanessa) a ring from 7am on the Friday morning 0432 874 021.

What to wear/bring

Please bring a full water bottle in a daypack with anything else you need (rain jacket). We may walk between sites and from the boat drop off to the site so best to have your personal belongings in a small day pack to leave your hands free to help carry any of the shared equipment that also comes along.

It is ESSENTIAL to wear enclosed shoes, long trousers, long sleeve shirt, hat, sunglasses, and suncream, gloves will be provided but if you want to wear your own please make sure they are leather gardening gloves.  All tools are provided.


Lunch and morning tea will be provided.  We have catered for a mix of vegos and meat eaters.  If you have any other special dietary requirements please let me know ASAP.

Toilets available 

There is a toilet near Catherine Park that will be available for us.

All going well after a fun day out we should be back at the Tennis Court Jetty by 1:30pm and the boat will return to Cottage Point by 2:10pm


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White Ibis Community Survey

Dear PNHA Members and Friends,

The White Ibis Survey is on again.

The NSW National Parks and Wildlife Service (NPWS) is conducting its annual White Ibis survey to get a better understanding of the distribution and abundance of this bird in NSW.

This year we are requesting participation from across Australia.

The survey has been running since 2003 and the information collected has assisted considerably with our knowledge of these distinctive birds. Increasingly, Ibis are moving into our urban environments bringing them into conflict with humans e.g. affecting aircraft safety, water quality and biodiversity.

To participate simply report the number of Ibis you see via the below website. Reports within a week of the 20th are accepted. Additional information such as breeding, the number of nests or wingtags (pictured above) is greatly appreciated.

Go to this link:

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Frogging Night November 1

Dear PNHA Members and Friends,


Here is an invitation from Pittwater Council:

Pittwater Council Frog Watch Night November 1!

Frogs are some of our most secretive creatures but also some of most sensitive water creatures. Come and lean more about our local frogs and how important they are for telling us how healthy our creeks and wetlands are.

Come to the CEC for a short information session with local frog expert Dr Arthur White and then go for a frog watching adventure in the Wetlands. We will use spotlights and listening to frog calls to identify our local froggy friends.

It’s a great adventure for all of the family. Children must be over 8 and accompanied by an adult.

This is a fantastic free activity!

Bring a torch, a headlamp and walking shoes.

Bookings are essential!


In person: Coastal Environment Centre, Lake Park Rd, Nth Narrabeen

Phone: 1300 000 CEC (232)



Frogging Night 2 Frogging Night 1Frogging NightDragonfly Environmental team constructing habitat for Green and Golden Bell Frogs at Cronulla Sydney

Dragonfly Environmental team constructing habitat for Green and Golden Bell Frogs at Cronulla Sydney


Pittwater Natural Heritage Association