Tracking fish movements
Macquarie Perch
Acoustic transmitter
This year, in addition to their regular tagging program, about 30 larger Macquarie Perch have been implanted with acoustic transmitters to find out more about fish movements. Several receivers have been located along the creek, which will record each time an implanted fish passes by. The logged data will provide valuable information on likely breeding sites, how far the fish travel, the locations of any obstructions to fish movement and refuge sites during low flows, e.g. do they move into the Goulburn River ?
For more information about Macquarie Perch posted on the DEPI website, click HERE.
The King Parrot Creek Project is funded through the Goulburn Broken Catchment Management Authority by the Victorian Government’s Securing Priority Waterways – On Ground Works Program. The project aims to improve the health of the King Parrot Creek and protect and expand Macquarie Perch habitat by providing grants to landholders for stream-side fencing, weed control, revegetation and off-stream watering for livestock. For more information about the project, phone River Health Officer Sue Kosch at the GBCMA on 5736 0100. Sue reminds us that taking Macquarie Perch from the King Parrot Creek is prohibited. Anglers are asked to record the numbers on any tagged fish caught and notify the GBCMA after carefully releasing the fish back into the stream.
When a black bird isn’t
When I was a city slicker, the black birds I saw in the backyard I could quite confidently call Blackbirds. And I’d have been right. The Blackbird was introduced to Melbourne in 1862 and, given its pest status, it deserves the scientific name of Turdus merula.
Now I’m living in the bush, the identification of black birds is not so easy. There are so many possibilities. On any given day our birdbath is frequented by any number of predominantly black birds – Currawongs, Choughs, Ravens (pictured, click to enlarge). My bird field guides helpfully point out the distinguishing features by which the birds can be identified. For example, the Little Raven (Corvus mellori) is described as having a small gular pouch under the base of the bill, the Pied Currawong (Strepera graculina) has 
white undertail-coverts and the White-winged Chough (Corcorax melanorhamphos) has a full, mobile tail. This is useful if you know what these things mean.
For me it is much simpler – eye colour. The Little Raven has (officially) a white eye (although I think it looks light blue); the Pied Currawong, a yellow eye; and the White-winged Chough, a satanic red-orange eye. Unless you are colour-blind you can’t go wrong.
.
Of course it is not that simple. Nature never is. The juveniles of these birds all have brown eyes. For them the simple descriptor, black bird, will have to do.
Ouch !
This fuzzy out-of-focus shot of a Spotted Paralote probably accurately represents how it felt after flying into our kitchen window. After rushing for the camera, the photo was hastily taken through the window before the bird managed to fly off into a nearby callistemon bush. There we were able to get some clear close-up shots as it gradually recovered. (Click on the photos below for a good look at this gorgeous bird). After a few minutes it flew off, apparently unharmed apart from possibly having a splitting headache!
Many birds are not so lucky and collisions with windows are a significant cause of mortality in some species of birds, although probably not to the extent of altering the conservation status of any one species. Estimates of the number of birds dying from window strikes are in the many millions, but do not appear to be based on any reliable scientific study. 
However, many of you will have heard that sickening thud and experienced the distress of finding a feathered body next to the window.
For information on why birds collide with windows and what can be done to prevent it happening, go to the Cornell Lab of Ornithology website HERE.
Not so lady-like after all
An adult Transverse Ladybird Beetle (Coccinella transversalis)
Ladybird Beetles or Ladybirds are of the family Coccinellidae, from the Latin word coccineus meaning scarlet. The term Ladybird or Lady Beetle originates from British red, seven-spotted ladybird. The ‘Lady’ refers to The Virgin Mary, who is often depicted in early paintings wearing a red cloak, and the seven spots symbolise the seven joys and seven sorrows of Mary.
The common Ladybird image is of a cute, benign creature – pretty to look at (usually orange/red with black markings) and beneficial in the garden for reducing pests. This image is further promoted by cartoons of the insect world, such as Minuscule on ABC-TV, where ladybirds are the ‘good guys’ whose main sport is to vex the poor hapless spiders.
The truth is slightly different. Adult and larval ladybirds are voracious predators of aphids, scale insects, mites and if food is scarce, each other. A fully grown larva will consume several
Larval Common Spotted Ladybird (Harmonia conformis) eating a ladybird pupa
hundred aphids per week. A ladybird larva moves around using a combination of its six legs and the tip of the abdomen, which can attach itself to surfaces. During feeding, a larva may suspend itself by the abdomen, leaving the legs free to grasp prey.
The red colour serves as a warning for ladybird predators. As extra protection, when disturbed ladybirds may exude an off-smelling toxic liquid. Not so lady-like after all.
What next ?
Not content with discovering Striped Legless Lizards and recording a snake-eating snake on their Strath Creek property (click HERE and HERE for the stories), Kay and Neil have found evidence of another threatened species, the Brush-tailed Phascogale (Phascogale tapoatafa). Unfortunately this time the discovery involved a dead animal.
Kay and Neil’s property includes one of the sites of the Strath Creek Biodiversity Project and, after conducting a bird survey on the site, we decided to check nest-boxes installed elsewhere on the property some time ago. One of the boxes showed clear signs of a phascogale’s presence: wool, bark and feathers as nesting material, and lots of smelly droppings (scats) – see photo at left. There was also a skull visible in one corner of the box which we decided to remove. This turned out to belong to a small phascogale with a lovely brush tail and very sharp teeth! – click on the photo for a clearer look.
This was presumably a juvenile from last year’s breeding, born in July or early August, making it about 7 or 8 months old, depending on when it died. The box was checked with a special nest-box camera in late January and found to be empty, so this was not the breeding site. The cause of death of the young phascogale is unknown and it is also not clear whether or not the box is still being used.
The extensive revegetation undertaken on this property and a neighbouring property by the Biodiversity Project will significantly improve the habitat available for phascogales and there will hopefully be an expanded population in the future.
Why is my fish batter moving?
Saturday night is home-made fish and chips night at our place. I prepare the fish and my partner makes the baked potato chips with rosemary. For my part, the batter is prepared using stone-ground wholemeal flour and a secret mix of herbs and spices. Last Saturday the batter did not look right – it appeared to be moving.
Adult Confused Flour Beetle
Examination under a microscope showed the mixture to be chock-full of insects. I initially thought them to be weevils but a closer look revealed them to be adult and larval Confused Flour Beetles (Tribolium confusum), not as confused as me I can assure you. And they are tiny. In the pictures, the size of the larva and the adult beetle can be compared to the nearby stone-ground flour particles.
Worldwide, these beetles are a major agricultural pest and are highly resistant to pesticides and radiation. They cannot feed on whole grain but readily feast on grain dust, flour and broken grain. The ‘confused’ name
Larval Confused Flour Beetle
comes from the fact that they are often mistaken for other common flour beetles, particularly the Red Flour Beetle (Tribolium castaneum). They can be distinguished by the shape of their antennae.
As I have had this flour for a while, the question in my mind is ‘Why has this infestation happened now?’ Of course the other question, which doesn’t really bear thinking about, is ‘How long have I been cooking with beetles without even knowing!?’
Restless indeed
We went to check on a report of several Snake-necked Turtles sighted in a dam on a property at Strath Creek. We didn’t find the turtles, but did come across this Restless Flycatcher busily darting around and hovering over another dam in search of insects, and sweeping its tail back and forth upon landing. Its scientific name, Myiagra inquieta, reflects its common name – Myiagros was a lesser Greek god with the role of keeping flies away from ritual sacrifices to Zeus and Athena, and the Latin ‘inquietus’ means restless or disturbed.
The Restless Flycatcher’s white front extends right up to its bill, which distinguishes it from Willie Wagtail (who also has a white eyebrow) and the other local flycatchers, Leaden and Satin, whose white underparts extend only to the dark upper breast. It has a diverse range of calls, including a strange sustained chirring or rasping sound often described as like a scissors grinder, which is not all that helpful – when was the last time you heard a scissors grinder? Anyway, click on the audio bar below to hear for yourself some of the sounds recorded at Strath Creek.
What lurks below
I know the photograph below is blurred but I am continuing the great tradition of indistinct shots of aquatic beasts. Who ever saw a crystal clear image of the Loch Ness Monster?
On my bicycle ride to the post office in Hazeldene I often stop on top of Coonans Bridge on the off-chance of glimpsing a platypus or a rakali. Sometimes I have been lucky. On this occasion I looked down and saw the two large white claws of a freshwater crayfish. As I saw it, it saw me and I had only one chance to take a photo. (Note to self—next time don’t leave the camera on manual focus!)
Given the white claws and where I saw it, my guess is that the creature in question is a freshwater crayfish of the species Euastacus, commonly known as the Spiny Crayfish because of the short spikes on the shell. The Spiny Crayfish is restricted to south-eastern mainland Australia and lives in permanent water sources at mid to high altitudes. The other common species of freshwater crayfish in our area is Cherax, commonly known as the yabby. It has a smooth shell and inhabits both permanent and ephemeral aquatic environments, including our dam. I only ever get to see yabbies (or bits of them) after a rakali (Hydomys chrysogaster) has had one for lunch (click HERE to view).
The freshwater crayfish has now joined the watch-list from Coonans Bridge. Next time I’ll make the picture even more out of focus and truly pass the creature off as Nessie.
It’s frog o’clock
Nature has a way of marking the passage of time. One look at the colour of the fields down in the valley will indicate what season it is. And looking at the phase of the moon will tell you about time’s progress through the lunar cycle. We have discovered another indicator on an even smaller timescale.
Must be lunch-time
After the bushfires of ’09 and the dramatic failure of our new fire pump, we placed at the corners of our house wheelie bins of water and mops (it is amazing the extent of fire-fighting one can achieve with a wet mop and a bit of adrenalin!). The wheelie bins are positioned to catch the rain runoff from the roof that misses the guttering. During winter the bins slowly fill up so that when summer hits they are full of water. In summer, apart from the birdbath, the wheelie bin is the only water source for a considerable distance and inevitably attracts a resident frog.
During the day the frog (circled) clings to the side of the bin (see picture left) and as the sun changes its position in the sky, the frog 
changes its position in the bin, staying just out of the direct sunlight. If you place a rough scale on this, in this case an old bicycle tyre with numbers on it, the position of the frog compared to the scale will give you a relatively accurate estimate of the time of day, sort of like a sundial. It works on sunny and overcast days.
Last year the time keeper was a Plains Brown Tree Frog (Litoria paraewingii) I think, pictured above. This year a Peron’s Tree Frog (Litoria peronii) has taken up the duties. Peron’s Tree Frogs have cross-shaped pupils (see picture left).
It is not as accurate as a digital watch but it is an energy-efficient biological clock – and it isn’t ticking.
A flying visitor
This odd little creature caught our eye as it clung to a window awning. At first glance you might think it was one of the Three Blind Mice!
It is in fact a moth, Elhamma australasiae, of the family Hepialidae. This is a male – the female is larger and plainer. They may be seen as early as late January, but are most commonly seen from mid-February through to late-March.
Thanks to Peter Marriott for the ID.
To see a wonderful array of moths recorded recently in the Strathbogie Ranges, we suggest visiting the Boundary Hill Forest Blog.
Focus On Fauna 