May 2016 – Go Birding

Leadbeater's Possum - Yarra Ranges State Forest

A feather for a tail

Posted on May 27, 2016 by CorwinCaelin

Earlier this week I knocked off work a bit early and headed up into the Central Highlands with Rohan Clarke http://www.wildlifeimages.com.au/ with a couple of targets in mind. We arrived at a site near the base of Lake Mountain that is known for Broad-toothed Rat and poked around a bit while waiting for dark. From here we headed out towards Woods Point stopping in likely looking habitat for owls, possum and glider. At the first stop we had a couple of Bobuck and a Greater Glider so things were off to a good start. Rohan had use of a thermal camera which again proved very good at picking up animals that otherwise would have been missed by normal spotlighting. A second stop had a calling Sooty Owl and yet more Greater Gliders and what Rohan thought was a Feather-tailed Glider but he could not relocate. This is a species which was high on my wish list so I was a bit disappointed to miss it…. but the night was young!

Bobuck

We moved on again to a new spot and almost immediately had good looks at a Leadbeater’s Possum flitting around. After seeing them in Tarago, Powelltown and Toolangi recently it was good to add another population to my records. We moved on and Rohan picked up a very small but hot object on the thermal camera – flicking on the headlamp I saw it was a Feather-tailed Glider which was quite light shy, zipping down the trunk and going to ground, fantastic stuff! The small eucalyptus it was in had a fair infestation of lerp which we surmised it was likely feeding on. I was elated but the twitching part of me was a bit torn – I had good views of its feather tail as it scuttled along but Feather-tailed Gliders have recently been split into two species, Narrow-toed and Broad-toed and both occur in Victoria so was unsure which I had seen. About now my head torch batteries started to die so I stopped to change them and of course Rohan located another another Feather-tailed Glider! Running across with a handful of batteries and torches there was a Feather-tailed Glider frozen in the fork of a small tree. In the excitement I did not check camera settings so the photos are not as good as they could be but were good enough to show that it was a Narrow-toed Feather-tailed Glider! Lifer and a very wanted tick under the belt! it gave us a good couple of minutes of viewing before vanishing into the night. We spent a fair bit of time in this area and found another couple of feather-tails which showed we must have found a good colony.

Narrow-toed Feather-tailed Glider – Yarra Ranges State Forest

We continued east, stopping regularly getting as far as Matlock before heading back. Plenty of Greater Gliders seen and we checked a known location for Leadbeater’s that Rohan had found previously and quickly found a couple of animals which gave a pretty good show with their diagnostic movements through the mid canopy. Another stop in a random location pulled in yet another Leadbeater’s Possum which sat and watched us for a while. We checked again the Feather-tail colony but could not locate any animals on this occasion but did hear some very distant wild dogs or dingos. Rohan tried his best howling impersonation and rather quickly the dogs came closer and closer until they were only a couple of hundred meters away. About now they must have realised they were being conned as they lost interest – still it was a fun experience! We were driving towards the campsite to call it a night when we rumbled a small looking boobook in the middle of the road. Rohan immediately suspected it a Tasmanian Boobook or Morepork and a quick couple of photos showed it to be the case with its heavily spotted underparts and phonebook yellow eyes. This is an excellent record and again is supporting evidence that small numbers of these birds winter on the Australian mainland. In many ways this was the sighting of an already excellent night!

Tasmanian Boobook (Morepork)

We camped down towards Big River where a pair of Powerful Owls called repeatedly just before dawn which rounded the night out well. Up early and back to Melbourne in time for an 11 am meeting. All in all it was a very successful evening with 5 Feather-tailed gliders, 4 Leadbeater’s Possums, 25+ Greater Gliders, Agile Antechinus and four owl species as well as plenty of the more usual suspects. The Leadbeater’s Possum records have been reported to relevant authorities. Now it is time to find a Broad-toed Feather-tailed!

Leadbeater's Possum - Yarra State Forest

More Leadbeater’s Possum action

Posted on May 23, 2016 by CorwinCaelin

I had some spare time Saturday night so I headed out to the Powelltown area to meet up with a mate Stephen and two of his sons – Adam (10) and Liam (8) to try and show them a Leadbeater’s Possum or two. On the way there I tracked through Tarago State Forest and was fortunate enough to spot a Platypus in the Tarago River minutes after talking to a fisherman who told me he had never seen a platypus there as the water is too dirty. Well the water looks pretty clean to me and Tarago Reservoir is in service as part of Melbourne’s water supply so I was not surprised to see a trail of muddy water and then a beak sticking up briefly in the increasing gloom. Now I just need to find a platypus in Bunyip sometime! A Bassian Thrush on the side of the road and a few lyrebirds were nice as I zipped around to Powelltown for the 6pm meetup.

With the boys both desperately wanting to see Leadbeater’s Possum and Stephen only having seen one previously, we headed out to check out colonies found previously over the past year or so. It was a full moon night so I was a little skeptical how we would go but we pretty quickly got onto a very nice possum which sat nicely for all to see. After a couple of happy snaps it jumped even closer beside the car showing us all its diagnostic movement which best resembles a squirrel. With the main target out of the way we continued on to try and get some better views as well as try and rustle up an owl or two.

Leadbeater’s Possum – Yarra State Forest

After a couple more stops we arrived at an area of perhaps ten year old regrowth that has been very productive on previous visits. It seems that this is a great place for possums and gliders of all shapes and sizes to travel and feed in the abundant wattle from denning sites nearby. Over a number of visits here I have found Greater, Yellow-bellied and Sugar Gliders, Ringtails and Bobucks and of course Leadbeater’s Possum – it seems as long as there are stags nearby, possums will travel to feed into areas like this. We were fortunate enough to find a number of Leadbeater’s Possums sitting low for some great views and a couple of snaps. Towards the end of this wander we watched several Leadbeater’s chase each other round, calling continuously in what appeared to be a territorial dispute. This was fascinating as it was probably the first time I have seen demonstrable interaction between individual Leadbeater’s Possums. The call was a continual staccato tsi-tsi-tsi-tsi which was very different to the drumming call I had heard in the past. Perhaps this was a territorial call, while the drumming is threat related? We had not heard a night bird of any description which is not unusual on full moon nights in my experience. I was very impressed by Adam and Liam’s knowledge, questions and discipline throughout our jaunt and I think they are both excellent young naturalists.

Leadbeater’s Possum – Yarra State Forest

With Liam getting a bit tired we headed back to Powelltown managing a nice Southern Boobook on the way down the mountain – still we did pretty well overall – just over two hours for nine Leadbeater’s Possum! After dropping them back at their car I had a bit of decision to make about what to do next. I decided to go again to Bunyip to chase owls despite the full moon – in hindsight a bad choice. Three and half hours wandering around Bunyip produced plenty of Yellow-bellied, Greater and Sugar Gliders but I could not even get a peep out of an owl of any description. Still they will be waiting for next time….

Yellow-bellied Glider worried about a Powerful Owl

Some Powerful Owl fun

Posted on May 18, 2016 by CorwinCaelin

With the forecast looking fantastic on Sunday night I finished up some family commitments and headed out to Bunyip State Park to look for some owl action. I arrived out there about 7:30 pm to still conditions and crystal clear skies. Jupiter was close to the moon which was half full and providing plenty of ambient light for moving around. Basic plan for the evening was to visit 4 sites in the park – two well known and two new sites – twice each to chase owls which should be quite vocal right now. I started at a nice known spot of mine where recently I have had Sooty and Powerful owl as well as the three regular gliders but all I had was silence. Despite a fair bit of poking around I could not even raise a ringtail. I moved on to another known spot where I had previously seen Masked Owl and sure enough after about 10 minutes I had strong call response several times but could not move the bird from its location in the forest across the valley.

Yellow-bellied Glider came in to greet the Powerful Owl

I drove around a bit with only the occasional Greater Glider spotlit and the odd boobook calling for company plus numerous Geocrinia victoriana until I eventually had a Sooty Owl fly across the road in front of the car which is the first time this has happened for me. I stopped and could hear the Sooty moving away calling as it went before settling several hundred meters away. I tried to call it back but it would not come any closer. The reason for this was soon apparent as a pair of Powerful Owls started calling with the deep male in response to the higher pitched female. I was alerted to the Powerful Owl sitting above me by a number of Yellow-bellied Gliders calling raucously with one even gliding into the tree beside the owl and charging up the trunk. I had read about this behaviour from Yellow-bellied Gliders and while I had heard and seen them respond to Sooty Owl calls this is the first time I had witnessed the mobbing behaviour. Despite this the Powerful Owl sat completely unperturbed looking down at me allowing me to take a few happy snaps. By now a second Sooty Owl had joined the first as they sat screaming with indignation the gully over which the owl ignored. After 10 minutes the owl had not moved so I left it to its own devices – for all I know it is sitting there still. A couple more Greater Gliders and a Frogmouth on the way out rounded it off. All in all a pretty good night and home in bed just after 11 which is not bad for a school night!

Powerful Owl – Bunyip State Park

Reason’s why we need a Great Forest Park – #1 – Leadbeater’s Possum

Posted on May 8, 2016 by CorwinCaelin

Last night I headed out to Toolangi State Forest with Rohan Clarke http://www.wildlifeimages.com.au/ for a night of spotlighting. Toolangi is not really a favourite site of mine due to the constant reminder of the destruction of clear fell logging with desolate coupes and immature regrowth through most of the area. Still it is the western most remaining bastion of the now critically endangered Leadbeater’s Possum so it is these we targeted along with the more common forest inhabitants. The basic plan was a loop around through the forest looking for new locations and potentially following up some old ones.

Mature Mountain Ash in Toolangi State Forest

The first few spots we tried were quiet with Bobuck, Greater and Sugar Gliders providing some interest. Rohan was using a thermal camera in the hope of picking up some interesting small mammals in the undergrowth while I used the more traditional head torch looking for eye shine higher up. A few small mammals and roosting birds were picked up with the camera which proves it can be a useful tool although I imagine you lose some of the experience of walking in the forest at night while staring at the screen. It was a seriously quiet night with not a single night bird heard or seen or Sugar Glider yap. More interestingly not a single frog was heard despite many heard on visits to other central highlands areas over the past couple of weeks. Less surprisingly microbats were not much in evidence with only a couple seen patrolling the forest roads.

We continued to try a number of new sites with no sign of Leadbeater’s Possum despite the habitat looking better although it was still not as prime looking as the areas around Poweltown. We did propose that potentially the less optimum habitat meant that the possums were in this area in lesser densities. The other theory was that they were less susceptible to our squeaking due to the time of year so went to check out a site where Rohan had previously found them. As soon as we left the car at this spot Rohan picked up one and then a second animal in quick succession – he is a jammy bastard like that! They were quite interested in us, jumping around and looking at us although not sitting close for good photos. We ended up finding 3 animals at this location and a separate animal perhaps 500 meters away which came in from a different direction. From here we tried some other prime looking areas without further success before calling it a night. All in all a successful evening for finding the 4 Leadbeater’s Possum but on the whole quite quiet for 6 hours of effort. With the recent upgrade (downgrade?) of Greater Glider to nationally vulnerable the good numbers in these forests could be important. Greater Gliders require large hollows for denning and breeding which are also important for other animals such as large forest owls so any moves to further protect the glider must also help these.

Unfortunately the possum’s did not sit for good pics but did manage a couple of ID shots below.

Leadbeater’s Possum – Toolangi State Forest

I have to say that I was less impressed by the forest in Toolangi than area’s around Powelltown where I have been concentrating in recent times but there is still some excellent areas of mature forest. It is clearly being logged hard and even areas of regrowth don’t seem to be as diverse in structure. There also seems to be less old stags left which are important den sites for Leadbeater’s Possum. There is still clearly an important population of these animals (and others) here though that needs to be protected and protected now. There is only one way we can save the Leadbeater’s Possum and that is through protection in a properly funded Great Forest Park. Do not let their habitat and our water catchments become like the logging coupe below – it is devastation in that pic but even those “habitat trees” remaining wont be alive once the coupe is burnt. #GFNP

Recent coupe in Toolangi – not yet burnt