Lexi Webster
Australia is home to about 30,000 species of flies, with the Bush Fly (Musca vetustissima) being the most iconic. Flies in Australia are known for their persistence, especially during the summer months. The introduction of cattle to Australia provided the perfect breeding ground for flies, as they rely on excrement to reproduce. The climate in Australia also provides ideal conditions for flies, as they prefer hot and dry weather. In addition, flies are attracted to the sugar in human sweat, and they seek out humans as a source of moisture, which is why they often hover around our faces.
| Characteristics | Values |
|---|---|
| Number of fly species in Australia | 30,000 |
| Fly species that humans commonly come into contact with | Bush fly, house fly, blowfly, mosquito |
| Reason for flies lingering around human faces | Seeking protein and moisture from sweat, tears, and eyeballs |
| Human defense mechanism | Waving flies away, known as the "Aussie salute" |
| Factors influencing fly population | Weather conditions, wind patterns, introduction of cattle and ruminants, presence of dung beetles |
| Fly breeding grounds | Dung from cows, sheep, and pigs |
| Australian native dung beetles' capability | Can only process marsupial faeces |
| Role of flies in the ecosystem | Pollination, breaking down organic matter, recycling nutrients |
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What You'll Learn
- Australian flies are attracted to humans because they want to drink our sweat and tears
- Dung beetles, which bury the dung that flies breed in, have decreased fly numbers in Australia
- Cattle and sheep were introduced to Australia, providing more dung for flies to breed in
- The weather in Australia is perfect for fly breeding
- Australian flies are persistent because they are hungry for protein to produce eggs
Australian flies are attracted to humans because they want to drink our sweat and tears
The bush fly's taste for human moisture is driven by its need for protein to produce eggs. The sweat on our bodies and the moisture around our eyes, mouths, and noses provide a valuable source of protein that female flies seek out. The introduction of cattle and sheep to Australia further increased the fly population as they provided ideal breeding grounds.
In addition to their protein needs, Australian flies may also be attracted to humans because of the sugar in our sweat. It has been suggested that Australians sweat sugar as a protective mechanism against the harsh Australian sun. The sugar in our sweat may make us more appealing to flies, similar to how they are drawn to the sugar in beer.
The persistence of Australian flies can be attributed to their ability to sense and react to our attempts to wave them away. With two sets of wings, they can quickly return to their position around our faces. Their compound eyes also allow them to anticipate our hand movements by sensing the sudden presence of shade.
While Australian flies may be a nuisance, they play an important role in the ecosystem. They are excellent pollinators, contributing to the support of plant life. Additionally, they are nature's recyclers, helping to break down organic matter and recycle nutrients.
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Dung beetles, which bury the dung that flies breed in, have decreased fly numbers in Australia
Australia has over 500 species of native dung beetles, which are black in colour and well-adapted to breaking down the droppings of native marsupials. However, these native dung beetles are poorly equipped to deal with the large, sloppy dung pads of cattle, which were introduced to Australia with the First Fleet in 1788. This created a perfect breeding ground for flies, particularly the bush fly, Musca vetustissima, which lays its eggs in dung.
In response, the Australian Dung Beetle Project ran from 1964 to 1985, during which time 55 species of dung beetle were imported from Hawaii, Africa, Europe, and South Africa. These foreign dung beetles were better adapted to breaking down cow and sheep dung, thereby reducing the amount of dung available for flies to breed in. The introduction of these dung beetles led to the virtual disappearance of bush flies in the moister regions of southern Australia during the summer and autumn. According to reports, the number of bush flies has dropped by 90% throughout Australia, indicating the success of the project.
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Cattle and sheep were introduced to Australia, providing more dung for flies to breed in
The introduction of cattle and sheep to Australia provided more dung for flies to breed in, which, in turn, led to a population explosion of flies. Dung is a perfect breeding ground for flies, as females lay their eggs in it, and the larvae then feed off the dung.
Cattle, in particular, depositing around nine big, moist dung pats per day, provided the ideal environment for flies to reproduce. Before the introduction of these animals, dung was scarce in the dry Australian climate.
To combat the increase in flies, foreign dung beetles were introduced in the 1960s. These beetles feed on the manure, destroying the flies' breeding grounds. Other methods of fly control include the use of insecticides, parasitic wasps, and traps.
In addition to providing more dung, the introduction of cattle and sheep may have also contributed to the persistence of flies in Australia by offering a readily available food source. Flies are attracted to the moisture around the eyes, mouths, and noses of mammals, as well as their sweat, which provides them with the protein they need to produce eggs.
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The weather in Australia is perfect for fly breeding
The weather in Australia is ideal for fly breeding. Firstly, the country experiences warm weather, which is favourable for flies. The arrival of warm weather in Australia has been observed to trigger a "bumper season" for the country's 30,000 fly species. In addition, flies thrive in hot and dry weather, which is characteristic of the climate in parts of Australia. For instance, in the southwest of Western Australia, the winters are too cold and wet for bush flies to survive, so they die out. However, when the weather warms and dries, the conditions become perfect for fly breeding, and the fly population increases.
The weather conditions in Australia not only favour the survival of adult flies but also provide an ideal environment for their reproduction. Flies in Australia rely on excrement to reproduce, and the introduction of ruminants, such as cattle, has provided an abundant source of dung for fly larvae incubation. The warm and dry weather, combined with the availability of dung, creates favourable conditions for the breeding and proliferation of flies in Australia.
Furthermore, the strong easterly winds experienced in the country can carry flies over long distances, contributing to their widespread presence. These winds can blow flies up to 300 kilometres in a day, allowing them to travel far and wide in search of favourable conditions for breeding and feeding.
The weather patterns in Australia, with periods of warm and dry spells, create the perfect environment for flies to thrive and multiply. The availability of dung from introduced ruminants and the absence of native dung beetles to control their population further contribute to the persistence and abundance of flies in the Australian landscape.
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Australian flies are persistent because they are hungry for protein to produce eggs
Australia is home to about 30,000 species of flies, with the most common ones being the bush fly, house fly, blowfly, and mosquito. The bush fly, Musca vetustissima, is the iconic Australian fly and is found countrywide. They are born from eggs laid in animal dung, which hatch into larvae and feed off the dung before pupating in a cocoon. When they emerge, they have only a short time to live and are driven to find a mate and produce eggs.
Female flies of some species, such as the bush fly, seek out humans because they require protein to produce eggs. This protein is obtained from the sweat, tears, and moisture around the eyes, mouths, and noses of mammals. The introduction of cattle to Australia provided an abundance of dung, creating ideal conditions for bush flies to thrive and leading to an explosion in their population.
The persistence of Australian flies, particularly the bush fly, can be attributed to their need for protein to produce eggs. They are attracted to humans as a source of moisture and protein, leading them to hover around our faces. This behavior has even inspired the "Aussie salute," a characteristic gesture of waving flies away from the face.
Additionally, the climate in Australia provides favorable conditions for flies, as they prefer hot and dry weather. Strong winds can carry flies over long distances, contributing to their widespread presence. While they can be a nuisance, flies play an essential role in nature as pollinators and recyclers of organic matter.
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Frequently asked questions
Australian flies, especially the bush fly, are persistent because they rely on human fluids like sweat, tears, and moisture around eyes, mouths, and noses to survive. They also need protein to produce eggs.
Australian flies are attracted to humans because humans act as mobile water drinking fountains for them.
Yes, there are about 30,000 species of flies in Australia.
Australia's climate provides good conditions for flies. They prefer hot, dry weather and can be blown by the wind up to 300 kilometres in a day.
One way to decrease the number of flies is by introducing foreign dung beetles to bury cow and sheep dung, which flies use to breed.
