EUROBODALLA NATURAL HISTORY SOCIETY Inc
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EUROBODALLA NATURAL HISTORY SOCIETY Inc. PO Box 888 MORUYA NSW 2537 www.enhs.org.au NEWSLETTER NUMBER 151 MARCH 2012 ENHS Annual General Meeting The AGM will be held in the meeting room of the Eurobodalla Botanic Gardens on Sunday 27th May commencing at 11am. After the meeting, we are planning to have lunch together and then take a walk through the gardens to Deep Creek Dam. A nomination form is included with this newsletter and all nominations should be submitted to the Secretary by 20th May. All nominations must include the consent of the nominee as well as signatures from two other members. We look forward to seeing you there. What to expect April/May By mid-April, flocks of migrating honeyeaters move through the shire travelling north. Red Wattlebird, Yellow-faced, White-naped, Brown and Fuscous Honeyeaters move in large groups along the coast, and in some years these flocks can be very large. Most headlands such as Toragy Point at Moruya South Head are the best places to see this spectacular movement. There is also a migration of Silvereyes at the same time, as the Tasmanian sub-species moves into our area for the winter. May usually brings the first influx of albatross to the area, particularly after strong southerly conditions. The most common are Black-browed, Yellow-nosed and Shy Albatross but occasionally a huge Wandering Albatross can be glimpsed. Once again, the local headlands are the best place for viewing. By late May the first of the Humpback Whales also make their appearance as they move steadily north to their breeding grounds in warmer waters. While most shorebirds have left the shire, a walk around any of the local estuaries can usually turn up some spectacularly coloured waders such as Bar-tailed Godwits. We are used to seeing them in their drab brown summer plumage, but they moult into beautiful breeding plumage as they migrate to their breeding grounds in the northern hemisphere. They can usually be seen on most local estuaries in early May. April and May is also the time when Black Swans begin to congregate in large numbers on larger Shy Albatross Photo: M. Crowley bodies of waters such as the estuaries at Moruya Heads and Tuross and Wallaga Lakes. Autumn is the time when they undergo their annual moult and during that time they are flightless and take refuge on these broad expanses of water until they can fly again. Some common birds such as Jacky Winter and robins move out of the forest into open country and can be seen on fences and overhead wires in most open farmland. As well, there is a movement of some species from the highland to the coast, and Little Ravens and Grey and Pied Currawongs become very common in our shire. Good birding. Mike Crowley What’s coming up… Field Meetings: Saturday April 14, 2pm: Coila Lake Meet near the amenities block on the southern edge of Coila Lake, Tuross Boulevarde, Tuross. Walk along the edge of the lake, across the wooden bridge. Buff- banded Rail, Spotless and Australian Spotted Crake, Peregrine Falcon. Sunday April 29, 9am: Monga National Park Meet at the parking area in Clyde Street (west of the Princes Hwy) at Batemans Bay. A number of rainforest tracks. Superb Lyrebird, Pilotbird, Rose Robin, Varied Sittella, Spotted Quail-thrush, perhaps a roosting owl. Saturday May 12, 1.45pm: Boat ride on Wagonga Inlet Meet near the Quarterdeck Restaurant in Narooma. We will explore the back waters of the inlet. White-bellied Sea-Eagle, cormorants, herons, egrets, terns and perhaps kingfishers. There is a limit of 12 participants and the cost will be approximately $15-20 per head. Please contact Mandy Anderson on 4473 7651 to book your place. Sunday May 27, 11am: Annual General Meeting at the Eurobodalla Botanic Gardens, Princes Highway Batemans Bay, in the Meeting Room adjacent to the café. Meeting at 11am, followed by lunch (there are BBQ facilities) and then a walk through the gardens. Brown Cuckoo-Dove, Australasian Grebe, Rose Robin, Crested Shrike-tit. Warm welcome to new members We welcome Stuart and Dianne Deans from Long Beach, Danie Ondinea from Coolagolite, Vladimir Mastera from Surf Beach, Mark and Sue Berry from Broulee. Thanks.... To Michael and Sarah Guppy and Mike Crowley for the talks they gave at our field meeting in March. The afternoon was well attended and enjoyed by all. Those mysterious predators: small rodents are in the frame Our article in the last newsletter referred to a mystery predator that has been raiding nests while leaving them in place and undamaged. We are now leaning towards small mammals as the culprits. Since the majority of our predations are in this category, we are somewhat flying in the face of the common perception that the predators are currawongs, kookaburras, snakes and lizards. There are four pieces of evidence that are leading us to this conclusion: 1. We have many examples from multiple species of very delicate nests having lost young and eggs but remaining in pristine condition. Often the nest in question is not only delicate but is at the end of a very thin branch. Any attempt by a currawong, kookaburra, snake or goanna to raid this nest would inevitably result in the destruction and displacement of the nest. 2. The last raided and pristine Yellow-faced Honeyeater nest we found in such a delicate position was empty except for three droppings that resembled mouse droppings. 3. Three times last season (2011/2012) we came across some sort of mouse or rat scurrying about during the day, approximately four metres up a black wattle, very much at home. 4. A priceless story from Jill Whiter: she told us that Stephen Marchant, who of course was working on the same site, once related to her having seen some sort of rodent crawling out, very carefully, from a Yellow- faced Honeyeater nest in which a female was sitting on eggs. After a standoff, the animal drove the bird off and ate the eggs without disturbing the nest, which was at the end of a Kunzea branch. Michael and Sarah Guppy. Flying foxes return to Moruya South Head A very large population of Grey-headed Flying Fox has once again moved into their regular camp in the Casuarina forest between South Head and Pedro Point. They first arrived in early January, and numbers have increased steadily until the end of February when tens of thousands could be seen pouring out of their roosts at dusk. They generally fly north over the airport into the forests between North Head and Batemans Bay. There is a large number of eucalypts in flower, mainly Ironbark, Red Bloodwood and Spotted Gum, so they have undoubtedly been attracted to these trees while they are blossoming. Mike Crowley Little and Fairy Tern nesting at Tuross It has been a bumper season for the Little and Fairy Terns at Tuross and it is possibly the most successful breeding colony in NSW for 2011/12. This is very good news for both species. The Little Tern (Sterna albifrons) is listed as endangered under the NSW Threatened Species Conservation Act 1995. Threats include loss of habitat, predation, extreme climatic events and human interference. The Little Tern that breed on the NSW coast in spring and summer are a migratory subspecies from eastern Asia. The Fairy Tern (Sterna nereis) has recently been described as vulnerable under the Commonwealth’s Environment Protection and Biodiversity Conservation Act 1999. Fairy Tern occur in Australia from Dampier in Western Australia, along the South Australian, Victorian and Tasmanian coasts. They are uncommon in NSW and are considered vagrants in Queensland. Little Tern on the nest Photo: J. Cornish In 2011, the Little Tern began to arrive at Tuross on 5th November and by 9th December there were more than 200 Little Tern and 20 Fairy Tern. NPWS Shorebird volunteers (including some ENHS members) erected fences and information signs but soon realised that they had to extend the area to accommodate the large number of nesting birds. The final fenced area protected 3.7 hectares, more than twice the size of previous years. There were 124 nests; 276 eggs were counted, an average of 2.2 eggs per nest; the final fledgling count was 132. The first eggs were seen on 15th November and the last of the new nests were observed on 15th January. The first fledglings (28) were counted on 3rd January, the last were sighted on 7th February and by 14th February all the birds had gone. The success rate for the colony was 47.8%. We estimate that 10 nests belonged to Fairy Tern and 12 Fairy Tern fledglings were definitely sighted, which means that there were 120 Little Tern fledglings. While the Tuross colony has thrived, only one nest was reported at Burrill Lake to our north. It is possible that the Little Tern reported at Burrill earlier in the season moved to Tuross following severe thunderstorms that affected large areas of the coast north of Batemans Bay in November/December 2011. To the south, Little Tern and Fairy Tern have bred at Mogareeka: there were 71 nests, including 7 Fairy Tern nests, 142 eggs (2 eggs per nest) and 56 fledglings, including 5 Fairy Tern. The success rate was 39.4%. Lucy Gibson, Jo Lane and Julie Morgan. John Cornish has taken some wonderful photos at the Tuross site. To view these, please see the Gallery page of our website. Fairy Tern chicks and egg Photo: J. Cornish The “Zip” Frog (Litoria fallax) I have been concentrating on ‘non-avian’ spotting for several months now, particularly frogs, as we have a frog haven in the pond in our garden.