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Horse flies, also known as deer flies or March flies, are a group of large blood-sucking flies that cause painful bites and irritation. They are present across the world, including in Australia, where they are a common occurrence during the summer across southern regions. With over 400 species of March flies in Australia, this introduction will explore the unique characteristics of these flies and their impact on both humans and animals.
| Characteristics | Values |
|---|---|
| Common Name | Horse flies |
| Scientific Name | March flies |
| Species | About 400 species in Australia |
| Diet | Blood, flower nectar, and pollen |
| Biting | Only female horse flies bite |
| Bite Effects | Painful, irritation, dermal nodules, secondary myiasis, anaemia, weight loss, and reduced milk production |
| Presence | Year-round, with seasonal spikes during the wet season in northern Australia |
| Preferred Habitat | Woodland |
| Control | Fly traps, grazing animals in open pastures during peak activity |
| Related Flies | Wombat flies |
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What You'll Learn
- Horse flies, also known as March flies, are present all year round in Australia
- March flies are vectors of important livestock production diseases exotic to Australia
- Only female March flies bite to obtain blood for egg production
- March fly bites are painful and can lead to irritation, blood loss and weight loss
- March flies are usually found in woodlands and are more prevalent during the wet season
Horse flies, also known as March flies, are present all year round in Australia
Horse flies, also known as March flies, are present in Australia all year round. They are a diverse group of large blood-sucking flies that cause painful bites, irritation, and blood loss. They are usually present in most locations in Australia throughout the year but can have strong seasonal spikes in abundance, with peaks following the wet season.
March flies occur throughout Australia, with over 400 species known to exist. They are commonly found in southern Australia during the summer and in northern Australia during the wet season. These flies are not too picky about their blood source and will target any warm-blooded creature, including humans, horses, and even crocodiles! Only the female March flies bite, as they require blood to produce eggs. They use their strong, piercing mouthparts to extract blood from their mammal hosts.
The bites of March flies are known to be particularly painful and can lead to various issues such as dermal nodules, secondary myiasis, anaemia, and weight loss. Their presence can also cause behavioural changes in livestock, such as defensive reactions, interruption of grazing, bunching up, and seeking shelter. While they do not cause significant problems for cattle in Australia, they are vectors of important livestock production diseases exotic to the country, such as surra.
Due to their preference for native wildlife over livestock, March flies can be challenging to control. They favour woodland habitats, so reducing livestock exposure during peak activity periods can help minimise the risk of bites. Fly traps can be used for surveillance, but their effectiveness in managing March fly attacks may be limited due to the flies' short feeding durations. Overall, March flies, or horse flies, are a common presence in Australia and can be a nuisance to both humans and animals alike.
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March flies are vectors of important livestock production diseases exotic to Australia
March flies, also known as deer flies or horse flies, are large blood-sucking flies that cause painful bites, irritation, and blood loss. They are vectors of important livestock production diseases exotic to Australia, such as surra. While March flies are present throughout the year in Australia, their population spikes during the wet season, particularly in northern regions. These flies can lead to significant production losses, including reduced weight gain and milk production, and may cause behavioural changes in affected animals.
March flies are not dependent on livestock for their survival, but they can pose challenges for livestock production. Their preference for woodland habitats means that the exposure of livestock can be managed by grazing animals in open pastures during peak fly activity. However, controlling March flies is challenging due to their independence from livestock. While they favour native wildlife, effective management strategies are necessary to prevent severe problems in cattle and other livestock.
The female March flies are the only ones that bite, requiring blood to produce the next generation. They possess strong, piercing mouthparts to extract blood from their mammal hosts, causing annoyance, dermal nodules, and secondary myiasis. Their bites can also lead to anaemia and weight loss in affected animals. Regular checking of livestock can help detect signs of irritation, such as defensive reactions, interruption of grazing, and bunching up.
The potential impact of vector-borne diseases transmitted by March flies, such as surra, could be significant for Australia's livestock sector. Early detection and control of these flies are crucial to prevent the introduction and spread of exotic diseases. Australia has implemented biosecurity practices, including health inspections and disinsection of returning livestock vessels and aircraft, to minimise the risk of exotic diseases and pests. The Screwworm Fly Freedom Assurance Program, for instance, focuses on surveillance and early detection of screwworm flies, which pose a significant threat to the livestock industry.
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Only female March flies bite to obtain blood for egg production
March flies, also known as deer flies or horseflies, are a diverse group of large blood-sucking flies found throughout Australia. They are usually present all year round but can have strong seasonal spikes, particularly during the wet season in northern Australia.
March flies are adept and manoeuvrable in flight and can travel kilometres in search of blood meals. They are not picky and will bite any vertebrate they can find, including humans. However, it is important to note that only female march flies bite. The females require a blood meal to boost their egg production, while the males feed on nectar.
Female march flies use their strong, piercing mouthparts to extract blood from their mammal hosts. They are attracted to potential victims by their movement, warmth, surface texture, and the carbon dioxide they exhale. The flies mainly choose large mammals such as cattle, horses, camels, and deer but are not species-specific. They also bite wallabies, birds, and even reptiles when humans are not around.
The bites of female march flies are painful and can lead to severe irritation, dermal nodules, secondary myiasis from other flies, anaemia, and weight and milk production loss. Their mouthparts consist of a bundle of six chitinous stylets that, together with a fold of the fleshy labium, form a proboscis for sucking blood. While there is no simple fix to avoid being bitten, wearing thicker clothes can provide some protection, and recent studies suggest that vertical stripes can confuse the flies.
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March fly bites are painful and can lead to irritation, blood loss and weight loss
March flies, also known as deer flies or horseflies, are a common occurrence throughout Australia. They are usually present all year round, but their numbers can spike seasonally, especially after the wet season. These large blood-sucking flies cause painful bites that can lead to severe irritation, blood loss, and weight loss.
March fly bites are not just annoying but can also result in dermal nodules, secondary myiasis, and anaemia. The bites can be identified by their small, red, itchy lumps, sometimes accompanied by a red welt or blister. These symptoms are typical of many fly bites, which can often be treated at home with soap and water, ice, and oral antihistamines or anti-itch creams. However, in the case of March flies, these bites can have more severe consequences for both humans and animals.
The female March flies, driven by their need for blood to produce the next generation, use their strong, piercing mouthparts to extract blood from their mammal hosts. This feeding behaviour can lead to blood loss in the host, which is particularly concerning for livestock. Heavy attacks on livestock can result in reduced weight gain and milk production, causing significant production losses.
To minimise the impact of March fly bites, regular checking of livestock for signs of irritation is important. This includes observing defensive reactions, interruption of grazing, bunching up, and seeking shelter. While fly traps can be used for surveillance, they may not always indicate the severity of the fly attack. Additionally, pesticides may have limited effectiveness against March flies due to their short feeding durations.
While March flies in Australia do not generally cause severe problems in cattle, their preference for woodland means that grazing animals in open pastures during peak March fly activity can help reduce their exposure.
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March flies are usually found in woodlands and are more prevalent during the wet season
March flies, also known as horse flies, are prevalent throughout Australia. With over 400 species of March flies in the country, they are typically present all year round, but their numbers can spike seasonally, particularly during the wet season in northern Australia.
March flies are usually found in woodlands, where they prefer to feed on native wildlife. They are not dependent on livestock, but they do not discriminate when it comes to their blood meals. While they are known to bite horses, earning them the nickname of "horse flies", they will feed on the blood of any warm-blooded animal, including humans, cattle, and even crocodiles.
The female March flies are the ones responsible for the bites, as they require blood to produce eggs. They use their strong, piercing mouthparts to extract blood from their mammal hosts, resulting in painful bites that can lead to irritation, dermal nodules, secondary myiasis, anaemia, and weight loss.
To avoid March fly bites, it is advisable to avoid woodlands during the wet season and opt for open pastures. While pesticides and fly traps can be used, they may have limited effectiveness due to the short feeding durations of March flies.
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Frequently asked questions
Yes, horse flies, also known as deer flies or March flies, are present in Australia.
Horse flies are found throughout Australia, including in Brisbane, Queensland, and northern Australia. They are particularly common across southern Australia during the summer.
Horse flies are typically present all year round, but their numbers can spike during the wet season.
Horse flies are large, agile flies with strong, piercing mouthparts used for feeding on blood. They are known for their distinctive buzzing sound.
Yes, horse fly bites can be painful, itchy, and irritating. Only female horse flies bite as they require blood to produce eggs.
