Bristle Fly: All You Need to Know for a Bug-Free Life

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Bristle flies are a fascinating group of insects known for their unique features and behavior. These insects are part of the family Tachinidae, which comprises around 8,200 known species worldwide. Bristle flies are named for the distinctive bristles that cover their bodies, providing a clue to their identity.

One of the roles of bristle flies is their contribution to the ecosystem as parasitoids. They lay their eggs on or in other insect hosts, and their larvae eventually consume the host from the inside, killing it. This makes them valuable in controlling pest populations, such as caterpillars, beetles, and aphids, offering great potential for biological pest control methods.

Interestingly, some bristle flies are also pollinators. Adult flies consume nectar from flowers and can help in the pollination process. Their presence and importance in various ecosystems make understanding bristle flies an essential topic.

Bristle Fly Basics

Identification and Characteristics

Bristle flies belong to the family Tachinidae in the order Diptera, which also includes house flies. They can be easily recognized by the following features:

  • Bristles covering their body
  • Large eyes
  • Resemblance to house flies

Similar to other insects, adult bristle flies have three main body sections: head, thorax, and abdomen.

Size and Color

Bristle flies can come in varying sizes and colors, depending on the species. For instance:

  • Some species are small, similar to house flies (less than 3⁄8 inch in length)
  • Other species can be as large as 1 inch in length
  • Colors range from black, brown, to metallic

Distribution and Habitat

Bristle flies can be found across the United States and in other countries as well. These insects inhabit diverse environments, such as:

  • Forests
  • Meadows
  • Urban areas

Now you have a brief understanding of the bristle fly’s basic identification, characteristics, size, color, distribution, and habitat.

Bristle Fly Life Cycle and Behavior

Development and Stages

Bristle flies undergo a complete metamorphosis, with four developmental stages: egg, larva, pupa, and adult. The larval stage, also known as maggot, is the main feeding stage of the insect. They transform to pupae, immobile and non-feeding, as they develop into adults.

Feeding Habits

Bristle flies have diverse feeding habits. Adult flies mainly feed on nectar and pollen, while larvae feed on various insects like:

  • Aphids
  • Caterpillars
  • Grasshoppers

Some species of bristle flies even act as parasites or predators, feeding on bees, beetles, and ants.

Mating and Reproduction

Mating in bristle flies involves the male placing a sperm packet into the female’s reproductive tract. After fertilization, females lay their eggs on suitable hosts or substrates, such as decaying organic matter or on the bodies of other insects.

Predators and Pests

Bristle flies have numerous natural enemies, including:

  • Spiders
  • Predatory beetles
  • Other kinds of flies

These predators help to control bristle fly populations in different regions, such as Wisconsin and Canada. Occasionally, bristle flies may cause infestations in households, and getting rid of them can be achieved by eliminating their breeding sites.

Bristle Fly Features

  • Bristles on the body
  • Two wings with distinct venation
  • Short antennae

Bristle Fly Characteristics

  • Robust or slender body shape
  • Wide color variation
  • Pollinators for some plant species

Pros and Cons of Bristle Flies

Pros

  • Contribute to controlling pest populations
  • Act as pollinators for some plants

Cons

  • Can cause infestations in homes
  • Some species are biting flies

Comparison Table: Housefly vs. Bristle Fly

Characteristic Housefly Bristle Fly
Size < 3/8 inch 1/8 to 1 inch
Appearance Dark, no bristles Bristles, colorful
Feeding Decaying matter Nectar, pollen, insects
Role Transmit diseases Pollinators, pest control

Bristle Fly Interactions with Humans

As Pests and Infestations

Bristle flies are considered pests because they can bite and bother humans, especially in outdoor settings. These insects are often attracted to human activities and events such as picnics, barbecues, or upcoming events listed on a calendar.

Some common issues with bristle fly infestations include:

  • Bites causing irritation and discomfort
  • Buzzing around and annoying people during outdoor events
  • Landing and crawling on food or surfaces, potentially spreading germs

Dealing with Bristle Flies

There are various strategies to deal with bristle flies. Here are a few examples:

  • Use insect repellent on exposed skin and clothing
  • Install bug zappers or fly traps in affected areas
  • Ensure proper sanitation and waste disposal to reduce fly attraction

For even more information, consider checking out online forums where people discuss their experiences and successful methods for dealing with bristle fly infestations.

A comparison table of common methods to deal with bristle flies:

Method Pros Cons
Insect repellent Easy to apply Needs reapplication
Bug zapper Continuous protection Needs electricity
Fly trap Chemical-free Limited coverage

By understanding bristle fly behavior and using the appropriate methods, humans can minimize the impact of these pests on their lives and activities. Remember, always prioritize safety and cleanliness when dealing with any pest infestation.

Resources and Further Information

Photo Galleries

There are various online resources where you can find high-quality images and photos of Bristle Flies. These photo galleries are valuable for:

  • visual identification
  • studying female and male differences
  • observing various stages in their life cycle

We recommend checking out BugGuide and looking up their taxonomy under arthropods and hexapods / calyptratae.

Online Field Guides

For more in-depth information on Bristle Fly identification and taxonomy, online field guides can be helpful. These guides give you a better understanding of:

  • Bristle Fly characteristics
  • Habitat preferences
  • Behavior

Some field guide examples include the Clickable Guide on BugGuide and the Arthropod Guide on Louisiana State University’s website.

Upcoming Events and Gatherings

Participating in gatherings and events can further expand your knowledge on Bristle Flies. Some notable gatherings are:

  • BugGuide Gathering: An annual event where arthropod enthusiasts meet to learn and share information. Upcoming gatherings include Spring 2021 in Virginia and New Mexico. More details here
  • National Moth Week: A global event focused on moth appreciation and education. Bristle Flies might be a topic of interest during these events. Check their website for more details.
Event Time Location
BugGuide Gathering (Spring 2021) Spring 2021 Virginia
BugGuide Gathering (New Mexico) TBD New Mexico
National Moth Week Annually Worldwide

Ways to Support

If you’re interested in contributing to Bristle Fly research and conservation efforts, consider donating to organizations like BugGuide. Their donation page provides more information on how you can support their cause.

Contributors and Acknowledgements

We are grateful to various naturalists who shared their expertise and knowledge about Bristle Fly, making this article possible. A special thanks to John F. Carr for his valuable insights and guidance.

Our platform encourages users to register and participate by adding comments to enrich the conversation around these fascinating creatures. We thank both expert professionals and enthusiastic amateurs for contributing to this article.

To ensure accurate information, we highly recommend seeking expert professional advice from your local extension office for specific information and assistance.

Please be informed, this article serves as a general overview of the Bristle Fly, and the information presented is not a substitute for professional consultation.

Characteristics of Bristle Fly:

  • Body covered with bristles
  • Diverse colors and sizes
  • Common in various habitats
Comparison Bristle Fly House Fly
Size Varies Less than 3/8 inch
Habitat Diverse Human dwellings
Life cycle Variable around 3 weeks

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We hope this article serves as a helpful starting point for those interested in learning about Bristle Fly and the diverse natural world. Remember, registering and participating by adding comments is a great way to share your thoughts and experiences.

 

 

 

 

 

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Authors

  • Bugman

    Bugman aka Daniel Marlos has been identifying bugs since 1999. whatsthatbug.com is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

    View all posts
  • Piyushi is a nature lover, blogger and traveler at heart. She lives in beautiful Canada with her family. Piyushi is an animal lover and loves to write about all creatures.

    View all posts
Tags: Tachinid Flies

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14 Comments. Leave new

  • The CSIRO’s giant tomes “The Insects of Australia” has a colour plate with one of these – but gives it as Formosia speciosa. Annoyingly, I can find no other mention of the species or genus online :/

    Reply
    • Please send the link. A search of Formosia speciosa and CSIRO did not produce any hits. Perhaps the source material you cited was an actual printed volume.

      Reply
  • d’oh – I shouldn’t have said “other mention online” should have I? Yes, it is actual printed media – a double volume of immense value to Australian entomologists

    Reply
  • Marlies Bugmann
    December 15, 2014 6:31 pm

    Small correction – of course, the fly is NOT the size of a ‘human thumb’, it is about the size of a HUMAN THUMB NAIL. – typo … I was distracted by the mesmerizing painting on the fly’s backside 🙂
    Marlies

    Reply
  • They were confusing it with the Yellow-headed Snail Parasite Blowfly – Amenia imperialis

    Reply
  • Scott Charnley
    January 19, 2016 4:44 am

    i have found one of these flies today in Mount Barker Western Australia

    Reply
  • Marcia Millard
    December 30, 2017 4:36 am

    I have seen and photographed one of these flys today, 30/12/2017 at Eggs and Bacon Bay, Tasmania

    Reply
  • Colin Vincent
    January 8, 2019 6:52 pm

    In reply to bugman:
    Reference to Formosia speciosa does indeed exist online. Formosia (Euamphibolia) speciosa, in one instance, and Google search for that reveals several more Australian sources. It may have once been treated as the same species, Idk, but is now classified as a different Genus to Amphibolia vidua. In some ways they look similar, but not the same.

    Reply
  • General question;
    Is it necessary subscribe in order to be able to post comments here?

    Reply
    • No, but we update comments daily and our editorial staff approves all comments to ensure there is nothing inappropriate.
      Thanks for your research regarding this posting.

      Reply
  • Ben De Hoog
    April 1, 2021 4:50 am

    I took some photos of one of these the other day in Margate Tas. Not heart shaped markings on the back though

    Reply
  • Hi folks. I have just seen this same dude on my way back inside tonight. I’m in Montmorency, Victoria. It’s blue colouration of the dots caught my eye. I’ve never seen one here so had to try and identify it ….. curiosity and all that! Thanks for having this info. available so I could identify it.

    Reply

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