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Toxomerus geminatus Many native pollinating insects are not actually bees, and flies are often overlooked and underappreciated for their role in pollination . Hoverflies are included in this group of non-bee pollinators. As an added benefit, many hoverflies are bee mimics: in both appearance and behavior. <br />
<br />
 Physically, they have a distinctive black and yellow pattern on their abdomens, which mimics the markings of stinging bees. This type of mimicry is known as Batesian mimicry and occurs when one harmless organism (hoverfly) resembles a harmful organism (stinging bee) to gain protection from predation. Hoverflies can&#039;t sting, but their physical resemblance to bees helps to protect them from predators. <br />
<br />
 Behaviorally, hoverflies continue to mimic bees as they are also pollinators. Although they are not as efficient as bees - probably partly because hoverflies aren&#039;t as hairy as bees (hairs aid in pollination by helping capture pollen to then transfer to other flowers). Hoverflies take their mimicry very seriously and some even buzz like bees! <br />
<br />
 There has been a global decline of pollinator species. Most humans assume that pollination is a free and abundantly available ecological service. But, this anthropocentric outlook has put too much pressure on pollinators by both increasing their demand and removing their habitat. It is estimated that at least 75% of the fruits and vegetables that we consume require insect pollination. Without pollinators, crops would not grow and most fruits and vegetables would become scarce or else prohibitively expensive. Production of other products will also be influenced by pollinator declines - for example, clothing industries would be affected since cotton is an insect-pollinated crop. So, it&#039;s obvious to state that pollination is critical for the production of food and other products. Non-bee pollinators, such as hoverflies play a role in this important process. <br />
<br />
 Additionally, some hoverfly species are useful as biological control agents because their larvae snack on aphids. Since most hoverflies have predatory larvae, using them in biocontrol may help control aphid populations.  Geotagged,Spring,Toxomerus,Toxomerus geminatus,United States,flower fly,hoverfly,syrphid fly Click/tap to enlarge Promoted

Toxomerus geminatus

Many native pollinating insects are not actually bees, and flies are often overlooked and underappreciated for their role in pollination . Hoverflies are included in this group of non-bee pollinators. As an added benefit, many hoverflies are bee mimics: in both appearance and behavior.

Physically, they have a distinctive black and yellow pattern on their abdomens, which mimics the markings of stinging bees. This type of mimicry is known as Batesian mimicry and occurs when one harmless organism (hoverfly) resembles a harmful organism (stinging bee) to gain protection from predation. Hoverflies can't sting, but their physical resemblance to bees helps to protect them from predators.

Behaviorally, hoverflies continue to mimic bees as they are also pollinators. Although they are not as efficient as bees - probably partly because hoverflies aren't as hairy as bees (hairs aid in pollination by helping capture pollen to then transfer to other flowers). Hoverflies take their mimicry very seriously and some even buzz like bees!

There has been a global decline of pollinator species. Most humans assume that pollination is a free and abundantly available ecological service. But, this anthropocentric outlook has put too much pressure on pollinators by both increasing their demand and removing their habitat. It is estimated that at least 75% of the fruits and vegetables that we consume require insect pollination. Without pollinators, crops would not grow and most fruits and vegetables would become scarce or else prohibitively expensive. Production of other products will also be influenced by pollinator declines - for example, clothing industries would be affected since cotton is an insect-pollinated crop. So, it's obvious to state that pollination is critical for the production of food and other products. Non-bee pollinators, such as hoverflies play a role in this important process.

Additionally, some hoverfly species are useful as biological control agents because their larvae snack on aphids. Since most hoverflies have predatory larvae, using them in biocontrol may help control aphid populations.

    comments (12)

  1. So pretttty! Posted 7 years ago
    1. Thanks! They must have very strong necks to carry around such big eyes ;) Posted 7 years ago
  2. Great description along a top photo. I believe the hoverfly mimicry of a stinging insect is also a weakness, at least in relation to people who assume anything black and yellow should be exterminated. But of course that is not the true threat, pesticides and monoculture are the main killers. Posted 7 years ago
    1. Great point. I know people who will swat to kill anything that flies near them - assuming it will try to bite them. Such fear of tiny creatures is so odd to me. I caught my Dad smashing mud daubers with a shovel and spraying them with Raid last summer. Nothing I said would convince him to let them be. I see this mentality in so many people. They are just so scared of insects. Posted 7 years ago
      1. I can relate to that because that is how I was raised as well, to fear insects and get rid of them if they bother me. I just never got that upbringing to respect them, or any true exposure to nature in general. It's not evil, just plain ignorance and the only perspective you know.

        A person can change though, never too late :)
        Posted 7 years ago
        1. I was immersed in nature as a child, but was afraid of insects until I was pretty much an adult and learned otherwise. Posted 7 years ago
          1. Good for you, and it brings so many cool things now! I still don't like them being on me, especially unexpectedly, but I see my tolerance and self control improving each year.

            To illustrate where I'm coming from: when first doing remote travel, I could barely sleep at the thought of lizards in the room (geckos). They don't occur at all in the Netherlands, so it comes across as some alien monster.

            Now we name them and cherish them as if they are pets, plus they hunt bugs which is good for sleeping at least. Crazy how exposure can change perspectives.
            Posted 7 years ago
            1. I don’t mind the non-biters landing on me. But, I’m well-known for scaring other hikers because I *yell* at the biting/licking flies that assault me in the woods. It’s happened 3 times in the past month already ;P. I’ve said it before, but I detest deer flies especially, and regularly tell them off.

              I got acclimated to and tolerant of insects while teaching environmental science and canoeing at Boy Scout camps in northern Maine. The bugs were just everywhere, and in larger quantities than I had ever seen. So, I adjusted and learned to love them!

              And, I think that it’s awesome that you guys name your lizards :)
              Posted 7 years ago
              1. It's always "Richard", don't know why :)
                I can imagine the yelling, some flies are just nasty.
                Posted 7 years ago
                1. We always name creatures "Bob"...And, I also don't know why ;) Posted 7 years ago
  3. This one should be Toxomerus marginatus as the abdominal margin is uninterrupted yellow. https://bugguide.net/images/raw/1HM/HYH/1HMHYH2HRR2H3H5LZRML1Z4LFHGL6ZLLAHGHOHXH1HGH4Z8HTHHLCH4HPZSLOH8HPZLL1HEHNZZL6Z.jpg Posted 6 years ago
    1. Hmm, I'm not sure about that. I was taught that the uninterrupted margin means a yellow border on the abdomen, which this fly does not have. I could be wrong, but it looks like Toxomerus geminatus because the abdomen has black and yellow bands reaching the margin. Posted 6 years ago

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''Toxomerus geminatus'', is a species of flower fly found from eastern Canada south to Texas.

Similar species: True Flies
Species identified by Christine Young
View Christine Young's profile

By Christine Young

All rights reserved
Uploaded Jul 16, 2018. Captured Jun 10, 2018 11:38 in 281 Main St S, Woodbury, CT 06798, USA.
  • Canon EOS 80D
  • f/3.5
  • 1/197s
  • ISO100
  • 100mm