The Multi-Talented Lyrebird

LyrebirdA lot of fencing has been happening at Pilyara lately. Thanks to a state government grant, we are fencing stock out of the timbered gullies that lead down to our creek. This is designed to protect wildlife and vegetation, as we live in a beautiful, mountainous area of high conservation value. All this hard work is already paying off – for the first time in years we’ve spotted a pair of Superb Lyrebirds in a fenced off gully, quite close to the house. What a thrill!

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John Gould’s early 1800s painting of a superb lyrebird specimen at the British Museum

Lyrebirds are famous for their amazing ability to mimic any bird song. They also mimic human sounds such as mill whistles, cross-cut saws, chainsaws, car engines, alarms, gun shots, camera shutters, dogs barking, babies crying and mobile phones. The male is renowned for the beauty of his long, lyre-shaped tail feathers and hypnotising courtship display. However our resident pair of lyrebirds bring more than beauty and music to Pilyara. They provide a far more practical service – as fire wardens in what is predicted to be a summer of deadly heat.

Recent studies show that lyrebirds reduce the chance of bush-fires in areas where they forage. They rake the forest floor in their search for worms and insects, burying leaf litter, speeding up decomposition, and reducing the amount of fuel available for bush-fires. They also inhibit the growth of ferns, grasses and other plants which would otherwise burn. The Latrobe University research was conducted in burnt and un-burnt sites of Black Saturday‘s two most devastating blazes. It showed lyrebirds reduced forest litter by a massive 1.66 tonnes per hectare over a nine-month period.

Lyrebird 3‘Our modelling suggests the reduction in litter fuel loads brought about by lyrebird foraging has the potential to result in markedly subdued fire behaviour…The loss of lyrebirds from forests could result in higher fuel loads and an increased likelihood of wildfires threatening human life,” said the report, published in the CSIRO’s journal Wildlife Research. ‘They forage like chickens, they’ve got big feet with really long toes so they’ve basically got rakes for feet. They rake through the litter looking for worms and little bugs, stuff to eat. They’re digging through that humus and litter layer looking for little invertebrates and whatever they can find.’

‘Through that process they reduce the litter fuel load by, on average, 25 per cent, or about 1.6 tonnes per hectare. And we put those figures into a fire behaviour model and found that that level of fuel reduction is enough [that] in low fire-danger weather conditions it excludes fire, fire’s not possible under low to moderate conditions. But even in more extreme conditions the fire behaviour will be more moderate, [with] lower rates of spread, lower flame height, so a less intense fire.

Our conclusion is that lyrebirds are reducing the chance of fires occurring in the areas where they forage and the ecological significance of that is that un-burnt patches within large wildfires are really important sites for animals to survive post-fire.’

On Black Saturday in 2009, the wind change that saved us, devastated Marysville and took many lives. Summer is always a tense time here at Pilyara. It’s lovely to know that we have at least two new fire wardens watching over us. 🙂  Play the video below for a taste of lyrebird song. (You have to skip the ad first) The great David Attenborough looks like he’s wandering around one of our gullies, and he misses the Whip Bird call.

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The Phantom Herd

 

( … orWhy I Changed My Mind About Alpine Grazing’)

Bessie CreekA beautiful little creek runs along the northern boundary of our family property, Pilyara. Beyond it lies Bunyip State Park, a forest in the southern foothills of the Great Dividing Range. Land either side of our creek is virgin country, too steep to bother with when the area was originally cleared for timber and grazing. It has always been a shady haven for ancient tree ferns and delicate ground orchids, all flourishing beneath a soaring canopy of messmate and mountain ash.

swamp wallabyPilyara’s bottom paddocks run down to this creek. There’s never been a fence. Steep, thickly timbered slopes have generally acted as a safe barrier for stock, although for years we regularly lost our colossal pet bullock, Toro, to the neighbours. My son often walked the friendly beast home with just a rope around his neck. Many times I’d toyed with the idea of fencing along the creek, but there was a problem. What about the black-tailed wallabies? What about the forester kangaroos? What about the fat wombats, that emerged from their gully warrens and  lumbered uphill each night to graze the moonlit paddocks? Fencing Toro in, would mean fencing them out – and after all, they were here first.

CattleOne rainy winter morning, I fed out hay to the cattle as usual, and got a big surprise. Our mob had been joined by another mob.  Dozens of big steers had appeared from nowhere overnight. Where had they come from? I rang around the neighbours and heard a fascinating story. Pilyara was apparently playing host to the phantom herd, a mob belonging to an old man upstream. He no longer maintained his boundaries, and his cattle had been roaming along the creek for months, randomly popping up to graze properties along the waterway, and disappearing just as quickly. I rang the ranger, complained to neighbours and begrudgingly fed hay to the blow-ins. Within a few days they were gone, just as mysteriously as they’d come

Braving the weather, I walked down the hill and tried to track the vanished herd. Sure enough, they’d moved out along the creek. What a mess! The banks were broken, caved into the water, taking great swathes of vegetation with them. A once pristine environment was little more than a wallow, flowing sluggish and muddy past trampled reeds and pugged up pools. Pity the poor platypus. The damage was plain as the nose on your face.

Until then I’d been a cautious supporter of alpine grazing. It reduced bush fires, didn’t it? In 2009 my family had spent days watching a monster fire lurk in the forest to our north. On Black Saturday, a capricious wind change saved us, but doomed many others. If grazing really reduced fires, I’d still be for it. A ton of research later, and I got my answer.  Both the extensive Esplin Report (following the 2003 alpine bushfires) and the recent combined CSIRO, LaTrobe University and NSW Department of Environment and Conservation study found that cattle grazing had no influence on the spread of fire.

EFNI’ve since joined the Environmental Farmers Network. It supports rural ecological programs, and acknowledges farmers as front-line stewards of the land.  Our farmers fence off creeks. They replant and reseed with locally indigenous trees and restore degraded river banks. They build wombat gates, preserve stag trees and put fish ladders in dammed streams. They work hard to give nature a helping hand.

We’ve just received a Healthy Waterways grant to build a wildlife-friendly fence along our creek frontage (Yay!). Healthy rivers, creeks and wetlands are the arteries of our landscape … the life blood of the bush. State and Federal Governments encourage such programs as best practice. Why should management of our precious alpine regions be any different? Look at the Bunyip State Park management plan and you find the seven Alpine grazinggrazing licences in the southern section of the park are not transferable, and no new licences will be granted. This is because cattle spread weeds, and damage native plants, wetlands and waterways. It’s true for the Bunyip forest and it’s true for the alps as well.

Our magnificent high country is celebrated in Australian art and literature (Including in my own 2012 novel Brumby’s Run).The mythical beauty of Man From Snowy River territory forms part of our national psyche. Romantic images of red and white cattle, stringing between the snow gums, feed into this notion. But the unfortunate truth is, cattle damage fragile landscapes, and there are plenty of forward-thinking farmers who understand this.

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