Have you ever wondered what binds humanity together? I mean, besides the simple stuff like sharing a planet and whatnot. What’s the one cause or concept we can all rally behind?
The answer, of course, would be our undying hatred of mosquitoes.
I mean, duh.
Mosquitoes are just the worst, and they have been for a long, long time. For an animal with a measly lifespan of not quite two months, it’s crazy to think about how much mayhem they’ve caused en masse. These ugly insects are responsible for countless epidemics throughout history and today, spreading diseases like yellow fever, Zika virus, malaria, dengue, West Nile virus, and more. Mosquito-borne diseases have even influenced the outcomes of major wars, relentlessly crippling infected armies and in some instances being used in biological warfare. Mosquitoes are still responsible for more than 1 million deaths each year, leading this article to label them the “world’s deadliest animal.”
To make matters worse, mosquitoes breed wherever there’s water, so they’re basically unavoidable. At home we used to dump rainwater out of whatever objects would collect it in our yard, but I don’t know why we bothered – there’s a pond right around the block from my house, so every summer inevitably brings with it a wave of those ugly dipterans. And thus a ton of my summertime memories are tinged with the scent of bug-spray.
Mosquitoes definitely outrank ticks and cat beetles as my least favorite arthropods of all time. Why, then, did I decide to write a post about them? Because I honestly believe that every living thing is here for a reason, and I’ve been curious for a long time as to what could possibly be the reason for these nasty dudes. One can’t deny the significance of their historical and modern impact on humanity, but are there any benefits to having them around? I did know previously that they’re a popular prey item of dragonflies, but I figured there had to be more than just that. I mean, dragonflies are super cool, but are they really worth mosquitoes?
Well, for one, mosquitoes do feed more than just dragonflies. As both larvae and adults, mosquitoes are popular prey items of fish, bats, spiders, birds, and other animals. In fact, eating mosquitoes is one attribute that shines a positive light on bats, frequently misunderstood animals that are much more important than they’re often given credit for. Bats eat substantial amounts of mosquitoes and other pesky insects nightly, and in some areas they pollinate economically valuable crops. Bats are also crucial pollinators for flowering plants that bloom at night rather than during the day, not to mention that their famous superpower (echolocation) helped inspire the creation of ultrasound and sonar technology. By siding with humans against mosquitoes, the often unappreciated bat draws positive attention to itself and fills its belly at the same time.
Some mosquitoes contribute to their ecosystems as pollinators as well, and mosquito larvae eat “microscopic organic matter” and therefore help keep the various bodies of water they inhabit a bit cleaner. Nevertheless, this insect’s most important role is definitely that of being food for other animals. Aside from comprising a sizable but replaceable portion of the diets of the organisms listed above, a few animals like mosquitofish rely heavily on mosquitoes as the bulk of their sustenance and would likely go extinct without them.
People have been trying to eradicate mosquitoes forever, but insecticides and other measures targeted at mosquitoes often impact innocent and more important plants and animals in the process. That said, it’s nice to know that mosquitoes aren’t entirely pointless, or it’d be a bit more disheartening that we haven’t figured out how to get rid of them by now. And who knows – maybe years from now someone will discover some super crucial thing that only mosquitoes do, and we’ll realize they were important after all. Either way, messing with the environment in such an extreme manner as eradicating the entire Culicidae family is bound to have unforeseen consequences.
In conclusion, I still don’t like mosquitoes, but I can admit that they aren’t worthless. They’re ugly, annoying disease vectors, but for better or worse, they’re strung into a vast array of food webs around the globe as pollinators, detritivores, and quarry.
So the next time a horde of mosquitoes plagues your neighborhood, take solace in the fact that even if you’re miserable, the local bats are thriving.
As both a Marvel and ant enthusiast, I’m a huge fan of Ant-Man. I love the movie’s humor and fantastic visual effects, but one of my favorite aspects has to be the way the protagonists utilize the strengths of different ant species: Scott Lang (Ant-Man) flies around on carpenter ant swarmers, rides a raft of fire ants, and of course incapacitates foes with the incredibly painful stings of bullet ants. I’d actually never heard of bullet ants before watching this movie, so I was curious to see whether or not those intimidating insects actually existed.
They do, hence this post. Although it would be interesting to do a post on fictional arthropods in the future, today is not that day.
As mentioned in the movie, bullet ants are ranked on the Schmidt Pain Index as having the most painful sting of any insect, sharing the high ranking of 4 with the infamous tarantula hawk wasp and warrior wasp. While each of these insects can cause downright agony, what sets them apart is the duration of the pain they inflict.
The warrior wasp’s sting dissipates after a couple hours, and you’d only have to endure that of the tarantula hawk wasp for about five minutes. However, the bullet ant packs a punch that torments its poor victims for up to 24 hours, hence it’s nickname “the 24-hour ant” in Venezuela. Better yet, a bullet ant will release chemicals when it stings that alert more ants to attack as well, exponentially increasing the victim’s suffering. Unsurprisingly, the bullet ant’s sting has been compared to the sensation of being shot, so we’ve stumbled across another surprisingly well-named arthropod. The stings are fortunately not fatal, but they do cause nausea, temporary paralysis, and involuntary shaking, among other symptoms. No, thank you.
If you live in the rainforest regions of Central America or South America, be sure to stay aware of your surroundings (heh, like you need me to tell you that – I don’t know for sure who has the scariest arthropods, but it’s definitely the American rainforests or Australia). Bullet ants build their colonies at the bases of trees but may climb high into the foliage in search of food, so leaning absentmindedly against the wrong tree trunk could be quite painful.
Fortunately, these terrifying ants don’t seek out people intentionally and won’t attack as long as they’re left alone. They’d actually prefer to spend their days sipping nectar, munching on smaller insects, and dealing with more pressing matters like fending off parasitic phorid flies and, well, each other. Like many ant species, bullet ants often go to war with other ant colonies.
Aside from inducing excruciating pain, bullet ants are also known for being some of the world’s biggest ants at about 1.2 inches in length. This is only a fraction smaller than the world’s largest ants, of the genus Dinoponera, which average about 1.5 inches. Interestingly, while the queen ant is typically much larger than the other ants in her colony, queen bullet ants are relatively similar in size to their workers. Thank goodness – with the size of normal bullet ants being what it is, their queen could have been hamster sized or something terrifying like that if they outgrew their subjects like normal.
…Okay, probably they probably wouldn’t be that big, but I’m sure their stature would still have been unsettling for such an already formidable insect. Yeesh.
You know what insect needs to enter the MCU in the next Ant-Man and the Wasp movie? Panda ants. Panda ants aren’t really true ants but rather an adorable species of wasp whose females are wingless (but not stingless) and bear markings that make them resemble panda bears. However, now that the Wasp has made her official movie debut, I think a case can be made for these cuddly insects (not actually cuddly, will sting you, do not touch) to join in on the action.
Imagine this: a tiny superhero riding into battle on the back of a mulch lobster, commanding an army of panda ants. Who wouldn’t want to watch that movie?
Crane flies go by many different names. Some call them giant mosquitoes, some call them mosquito hawks. Some even call them granddaddy longlegs, even though that nickname clearly belongs to harvestmen. Most of my encounters with these gangly insects have been specifically around bunkbeds at summer camps, where they are often referred to as “aaAAH! IS THAT A MOSQUITO?? KILL IT, KILL IT, KILL IT!”
In other words, crane flies get a lot of undeserved hate. For one, they are NOT mosquitoes and will NOT suck your blood. In fact, crane flies won’t bite you for any reason at all because they simply can’t: adult crane flies, like several other arthropods we’ve discussed previously, do not eat. Sometimes they’ll sip on nectar, but that’s about it. What all these adult insects have against food I do not know, but I suppose it keeps them focused on the task of mating and laying eggs. Crane flies in particular can lay up to 300 eggs in a matter of days. You can tell male and female crane flies apart because females have larger abdomens that end in a pointed ovipositor, which resembles a stinger but is actually for laying eggs.
Like their smaller lookalikes, crane flies belong to the fly order, Diptera. They’re not as common indoors as house flies, but you can find them on outer walls or near windows. Outside, crane flies frequent moist areas with plenty of plant life and can often be found near bodies of water. Before losing the ability to eat in adulthood, crane fly larvae are detritivores that feed on decaying plants, among other things.
Crane fly larvae can live in terrestrial or aquatic habitats depending on the species, and are collectively referred to as leatherjackets in reference to their tough exoskeletons. Which means I now feel compelled to buy them tiny motorcycles. Sigh… If only they had hands… and feet… and tiny roads to drive on…
Despite their gangly appearance as adulthoods, leatherjackets lack legs entirely and instead wriggle around like worms. They do have little tentacle-like protrusions on the ends of their abdomens though, which they can extend if they feel threatened, such as if someone tries to pick them up. It’s an odd reflex, sure, but if something started elongating itself when I picked it up I’d probably drop it really fast. In the world of arthropods, sometimes being weird is what keeps you alive.
Leatherjackets undergo four instars, or molts, before pupating. They typically live in moist areas near bodies of water in the pupa stage, which lasts only one to two weeks. Then it’s off to mating, laying eggs, and maybe sipping a little nectar if time allows, as the adult crane flies have mere days to live.
Adult crane flies are… doing their best. Even with little organs called halteres that help them balance, these gangly insects are notoriously the worst fliers in all Diptera, and their flight patterns are consistently referred to as “wobbly.” I guess those long legs aren’t particularly aerodynamic. Their limbs also break off relatively easily, which may actually be a defense mechanism allowing crane flies to escape from predators.
Although leatherjackets can be pests to some garden plants, crane flies play a vital role in their ecosystems. They serve as a food source for a variety of arthropods and chordates, including fish, dragonfly larvae, spiders, and birds. Additionally, leatherjackets can offer up food besides themselves to their community: also known as “shredders” for their messy eating habits, leatherjackets recklessly tear leaf matter into tiny pieces while they eat, inadvertently making salads for smaller animals to feed on.
Crane flies may be bumbling fliers, and their kids might wreck your flower garden. However, these funky flies definitely do much more good than harm to the environment, providing nourishment for other animals and perhaps pollenating a little along the way.
And remember: they are NOT mosquitoes. Because there’s no way I’m printing out tiny “Hi, My Name is Crane Fly” nametags for the thousands of these insects across the U.S., it’s up to us to correct this case of mistaken identity and spread the word ourselves. Say it loud and say it proud: crane flies are not mosquitoes, and they mean us no harm.
However, their larvae will fix you tiny salads with their mandibles. How sweet.
When I was in the fourth grade, my amazing science teacher brought in not one pet, not two pets, but dozens of little frogs, fiddler crabs, and meal worms to be our temporary class pets. Okay, they were actually there for us to study and do little experiments with, but we would be taking them home at the end of the unit and basically thought of them as pets from the get-go. Most of my friends wanted frogs, but I claimed a little fiddler crab and named her “Speedy.”
I used to think that everyone gave their pets and toys dumb names when they were little, but the number of times my parents have made fun of me for Cowie, Sealy, Giraffy, etc. makes me wonder if that was just a me thing. Hmm… maybe I should give the taxonomists some slack this week, naming animals is harder than I often acknowledge on this blog.
Speaking of naming things, fiddler crabs get their name from the way male crabs seem to hold their larger pincer like a fiddle. I myself would’ve just called them Hey crabs, because the ones I see in the marsh are always waving their claws up and down like they’re saying “hey” to each other. Interestingly enough, another name for fiddler crabs is “calling crabs,” which I am definitely going to use now.
In actuality, calling crabs are neither making music nor calling to each other when they wave. Instead, they wave to get rivals to back off their turf or beckon potential mates. Male crabs will also use their large claw to fight with one another over burrows or females. While having a long, lightweight claw is ideal for attracting mates, males with heavy claws have the advantage in claw-to-claw combat.
Despite the fact that most calling crabs are just over an inch in length, their burrows can be as deep as two feet! Calling crabs stay inside their burrows during high tide, blocking up the entrance with mud to keep out the water. They can also quickly slip into their burrows during low tide if they spot a predator approaching – or if you get just a little too close for comfort trying to take their picture. I know we often use “crabby” as a synonym for “grumpy,” but maybe we should use it as one for “shy” instead.
Aside from serving as an escape route, calling crab burrows are thought to aerate the mud in marsh habitats. These tiny crustaceans also contribute to their ecosystems by eating bacteria and algae out of the mud, and serving as food for a variety of larger animals like fish and shorebirds. You can find fiddler crabs in a variety of tidal areas along the coast, including mudflats and saltmarshes.
Calling crabs typically live in large colonies, so if you spot one you’re sure to find plenty more nearby. Because the house we stay in is typically on the sound, my family and I run into calling crab colonies all the time during our annual beach trip: we might kayak around a corner and see a whole city of fiddler crabs waving at us from under someone’s dock. Of course, they all disappear into their burrows the second you get close enough for a good picture, but they’re still fun to admire from a distance.
Did you know calling crabs use their little claws like sporks to scoop food out of the mud and bring it to their mouths? Because males have one big, fancy claw and only one little claw, it takes them twice as long to eat as females. As Larry the Cucumber would say, “fashion has its price” (if y’all don’t know what VeggieTales is, click that hyperlink for a “sweet and sour half an hour” of high-quality children’s programming).
While Speedy was a fun pet, I don’t know that I would keep a fiddler crab again. She had sand and saltwater, and the terrarium I got her in was about the size of the one she had in the classroom, but looking back I think she was probably lonely without the rest of her colony. Calling crabs are social crustaceans that need others to, you know, call to.
In other words, if I ever decided to get fiddler crabs again, it will be fiddler crabs, plural. These guys would really fare best left in their natural habitat, but if the opportunity ever arises for me to adopt a colony of fifty calling crabs or whatever, you would find me converting the living room into a mini marsh in a heartbeat.
Before today, I knew literally nothing about termites except that they eat wood and build giant castles (I’ll come back to that later). I didn’t even know what they look like; I’ve only ever seen them in cartoons in which they didn’t even have the right number of appendages.
Well, feast your eyes, everyone. This is what termites look like:
If I’m being honest, they kinda look like those helicopter seeds that fall off of maple trees slowly metamorphizing into ants. But, since “metamorphizing seed-ants” doesn’t have a great ring to it, I’m going to call them beaver ants instead. Because beavers also eat wood. I mean they at least chew on wood, they eat the bark off and stuff…
Okay, whatever, beavers don’t actually eat the wood, but you get the point.
Although ants belong to the order Hymenoptera and termites are members of Blattodea, these two insects do share some similarities. That said, I feel like I use ants and lobsters as comparison points for other arthropods a lot, but lobsters are basically The ArthroBlogger’s mascot at this point and, well, I like ants. If you’re reading a bug blog you probably like ants too, so we’re going to talk about ants again.
Termites and ants both have very similar colony breakdowns: each colony has a queen who is larger than all the other colony members and is responsible for laying eggs. In addition, both ants and termites might be either workers or soldiers. Workers in ant and termite colonies keep the colony clean and stocked with food, and also take care of the colony’s young. In fact, both ant and termite workers are adept agriculturalists: while ants are known to herd aphids and other insects for their honeydew, termites cultivate fungi that can convert their food into more nutritious forms (I knew wood couldn’t be all that special on its own). Soldier ants and termites are often bigger than the workers and are in charge of protecting the colony from predators and other threats. Both ant and termite colonies can also send out flying swarmers to start new colonies of their own.
Ants and termites not only share similar colony roles, but the physical structure of both insect kingdoms are a sight to behold (unless you have a termite infestation, then you’d probably rather not behold them). While most ants build impressive labyrinths underground, some termites construct massive, chimney-like mounds of dirt that can reach up to 30 feet in the air! Keep in mind your average termite is less than an inch long. While the termite colony itself is actually located underground, the mounds circulate air by cycling oxygen and carbon dioxide in and out of the colony as the mound warms and cools throughout the day.
Apparently the ants aren’t too happy with the termite’s massive mounds making their ant hills look like puny piles of dirt (which, to be fair, they are). In fact, ants and termites are sworn enemies known for their battle-to-the-death-on-sight relationship. Unfortunately, siding with the termites means rooting for the underdogs: while termites are bigger than ants, that’s really their only advantage during a colony invasion. Ant invaders typically outnumber their termite foes and are much more combative. If the termites can seal off all the entrances leading to their queen’s chamber before the ants get in, then the colony lives to fight another day. However, if the ants capture the queen and carry her off to be eaten, then the colony will soon die off no matter how many other termites survive.
Just because they’re divided into groups like “workers” and “soldiers” doesn’t mean that termites are mindless drones bent on doing their jobs and nothing more. In fact, termites are quite social individuals that groom each other frequently to keep the colony clean and healthy. Additionally, since soldiers and swarmers are unable to eat on their own, worker termites take the time to feed their friends mother bird style – it may be gross, but at least it keeps everyone’s bellies full.
Speaking of eating, why do termites eat wood? The answer is that they’re actually after cellulose, which all you biology students will recognize as an important polysaccharide found in the cell walls of plants. Unfortunately, termites that have invaded your home may also burrow through the nonorganic substances standing between them and their cellulose dinner, such as furniture coverings and insulation. While difficult to spot, one common sign of a termite infestation other than seeing the insects themselves is the presence of mud tubes in cracks or around pipes in your home. You can also tap on wooden baseboards and windowsill to make sure they haven’t been hollowed out.
I’ll bring jumping spiders into my home and tolerate the presence of stinkbugs, but I draw the line at arthropods that eat my stuff. The desk I type these posts on is made of wood, and I’ve been told it’s bad for my posture to type on the floor. Sorry, termites – you’re free to eat the stumps in the backyard, but nobody messes with my writing space. Or my spine. They’re both kind of important to me.
Remember that brief period of time when we thought we’d have to deal with murder hornets on top of everything else going on in 2020? Don’t worry if you don’t, it was pretty easy to miss in the midst of all the chaos. Nevertheless, today I’d thought I’d shed a little light on these forgotten horsemen (hornetmen?) of last year’s apocalypse:
1. “Murder hornets” isn’t their official name
What we’ve come to call “murder hornets” for, well, murdering bees, are actually Asian giant hornets. They are native to parts of India and eastern Asia and were not spotted on the North American continent until 2019.
2. They truly are giants
3. Yes, they have been spotted in the United States and Canada
The first murder hornet sighting in the U.S. was in the state of Washington in December 2019. No one knows yet how they got here, but so far they have only been spotted in Whatcom County, WA and British Columbia.
4. Honey bees and murder hornets don’t mix
One of the big concerns that arose around the murder hornets was that they would wipe out North America’s honey bee population. These angry insects ransack honey bee hives to eat or feed their young with the developing larvae and pupae inside. They also kill the adult bees by beheading them.
5. Honey bees aren’t the only victims
Aside from honey bees, murder hornets also prey on other insects, such as beetles and other hornets. Additionally, hornet and yellow jackets hives have been known to receive the same horrific treatment from murder hornets as honeybees.
6. Asian bees know how to put up a fight
Fortunately, bees living in the hornets’ native range have developed a few strategies for fending them off, including covering their hive entrances with animal feces. In terms of a less disgusting but still odd tactic, bees have also been known to bake the hornets to death by surrounding them and vibrating their wings really hard, increasing the temperature around their foe to 117 degrees Fahrenheit.
7. Getting stung is no joke
Not only are they quite painful, but murder hornets stings are more toxic than most bee stings, which can spell trouble if you’re allergic or get stung many times. Additionally, murder hornet stingers are long enough to puncture bee suits. Looks like it’s time for suits of armor to come back in style.
8. They have several look-alikes
If you think you’ve spotted a murder hornet, don’t freak out, especially if you’re not anywhere near Washington or British Columbia. Both eastern and western cicada killers share an uncanny resemblance to murder hornets, although both have lighter markings and are noticeably smaller when compared side-by-side. European hornets also share similar features with murder hornets, but are also smaller and have a brighter yellow thorax.
9. Who you gonna call? The Department of Agriculture!
If you’re pretty sure that hornet you ran into this morning was of the murdering kind, and you live in Washington, you can report your finding here.
10. They’re really not a big deal at the moment
Fortunately, it doesn’t seem likely that the murder hornets will be terrorizing the U.S. or Canada anytime soon. Not only were the only two discovered nests mostly wiped out by officials, but traps are being set throughout Washington state and in nearby areas to decrease the likelihood of the hornets’ territory spreading. Besides, based on how last year went, I’m sure we’ll have volcanic eruptions or radioactive bears or something to deal with instead before the hornets can become a real issue anyway.
Then again, I thought COVID-19 was going to stay in Washington when it first hit the U.S., too. Maybe it’s time to trade in our face masks for chainmail bee suits.
Or anti-radioactive-bear darts. Let’s be honest: at this point, that wouldn’t surprise anyone.
As mentioned in the 50th ArthroBlogger post, I shall henceforth be referring to tarantulas as porcupine spiders. I thought the name would be a nice little nod to one of their more interesting and often forgotten defense mechanisms: when tarantulas are scared, they can launch tiny, chitinous hairs at their attackers. In other words, it’s a good idea to wear safety goggles or cover your pet tarantula with something when cleaning their cage.
…As a biology student, I feel compelled to add a disclaimer here that real porcupines do not actually shoot their spines. The spines are sharp and pull off easily, but they are not projectiles. Nevertheless, I think “porcupine spider” sounds cute so we’re just going to roll with it.
It seems like porcupine spiders get a bad rap just for being big. Actually, I think a lot of animals get a bad rap for body traits that have nothing to do with their personalities: people don’t like mice because of their tails, or frogs because they’re slimy… Golly, now I need to become the ChordataBlogger too just to clear up all these dumb misconceptions about innocent vertebrates.
Hmm… maybe someday. But not today, there are way too many arthropods to cover first.
Although capable of biting, porcupine spider venom has never killed anyone. These large arachnids are venomous just like every other spider, but their toxicity won’t send you to the hospital or anything unless you’re allergic. In fact, they’re much more likely to run away or shed ballistically at you than give your finger a chomp, and if they do bite you they might not even inject any venom. If you are ever bitten by one of these fluffy fellows, just wash the bite with soap and put an ice pack on it. It’ll probably get red and swell a little like a bee sting, but it’s nothing to worry about unless you start having an allergic reaction. In that case, you should probably see a doctor.
One of the most famous porcupine spiders has got to be the Goliath birdeater – aka the largest spider in the world. These whoppers can grow to almost one foot in length and are known for (you’ll never guess) eating birds.
ArthroBlogger: Wow, so you eat birds, that a pretty big feat for a spider!
Goliath birdeater: Um, yes, bird-eating! That is definitely a thing that I have done… at least once… maybe.
ArthroBlogger: Wait, so you don’t eat birds?
Goliath birdeater: I mean I could if I got the opportunity, but birds fly and I live underground. We really don’t come in contact that often.
ArthroBlogger: But it’s in your name, seems like you’d eat birds all the time.
Goliath birdeater: Oh come on, there’s plenty of nonsense animal names out there. I mean, camel spiders don’t eat camels!
ArthroBlogger: Yeah, so we started calling them Kalahari Ferraris instead. Because they’re fast and they live in the desert.
Goliath birdeater: …Oh.
ArthroBlogger: …Would you… would you want to change your na-
Goliath birdeater: I’d like to go by Hank.
So no, Goliath birdeaters don’t eat birds all that often and actually prefer to dine on insects, but I applaud whoever named this guy for highlighting its more unusual habits over the mundane. Goliath birdeaters are also known to eat lizards and small rodents from time to time, and occasionally serve as a savory dish themselves for humans in parts of South America… I guess that explains why Hank didn’t want to hang out for very long after the interview.
Porcupine spiders in general have a lot of predators to watch out for. They’re commonly preyed on by snakes, birds (ironically), opossums, and many other animals, but the one they’d least like to run into would probably be the tarantula hawk. Actually a wasp rather than a tarantula-obsessed raptor, the tarantula hawk paralyzes porcupine spiders with its infamously painful sting. Then, much like how mud daubers treat orb weavers and black widows, the tarantula hawk drags its immobile victim into its nest and lays an egg on it. I think you can guess what happens next.
If they do manage to avoid the crazy wasps and other hungry arachnid-eaters, porcupine spiders can actually live for a pretty long time. The males don’t typically survive long after reproduction, but female porcupine spiders can live up to 30 years! By comparison, most other spiders only live for around two years. That’s like a person living to be 1200 if everyone else typically lived to be 80.
Porcupine spiders have enough to worry about without us acting like they’re monsters. Like all animals, porcupine spiders should be treated gently and with care, but they’re no more dangerous than your pet cat – although I’ll admit, they’re much less fond of being pet or handled. Porcupine spiders eat garden pests, and their venom is being studied to potentially cure diseases such as Parkinson’s and sickle cell anemia. Plus, they frequently have adorable species names like the Chilean Rose, Honduran Curly Hair and Pink Zebra Beauty! What’s not to love?
Just be sure to avoid those urticating hairs, and tarantulas are nothing to fear. Tarantula hawks, on the other hand, I’d rather stay far, far away from.
Although they scare me more than stinging insects, I’ve never actually been bitten by a horsefly. In fact, the longest interaction I’ve ever had with one of these scary dipterans was at summer camp when a friend of mine rescued a big, gray horsefly from drowning in the pool. She, her twin sister and I spent a good portion of that week rescuing bugs from water and footpaths, as this girl was superhumanly adept at handling bugs and would scoop up stinging and biting insects like they were caterpillars.
We carried (or she carried and we followed) the partially-drowned horsefly over to a counselor to ask if the big fella was okay. The counselor, apparently unaware of my friend’s superpowers, snatched the horsefly out of her hand and chucked it over the pool fence in one fluid, reactionary motion. We stood there gaping for a few moments while the counselor processed the situation and tried to convince us that the poor dipteran was okay. However, its fate remains a mystery to this day – as does where all the camp friends I made over the years have gone off to. Hope they’re all doing well.
Anyway: horseflies. These blood-sucking insects really are flies in the order Diptera and get their name from feeding on horses. That’s right, for once the taxonomists actually gave an arthropod a logical name. Give yourselves a pat on the back, guys, good job. I knew you could do it.
Horseflies are so despised that they make mosquitoes look good. I mean, no one wants to have their blood sucked, but in North America mosquito bites just itch while horsefly bites are painful from the get-go. Then again, mosquitoes are infamous for spreading malaria, Zika virus, West Nile virus and other deadly diseases in other parts of the world, while at most a horsefly will give you a small, potentially infected welt… There’s really no winning when it comes to vampiric dipterans.
Here’s a little nightmare fuel for ya: you cannot escape horseflies. Want to go swimming this summer? Horseflies are attracted to water. Rather go for a bike ride instead? Hopefully it’s a rusty bike, because horseflies like shiny things. Guess you’ll just take your dog for a walk then, huh? Well horseflies are also attracted to movement. Fine then, you’ll just sit there and do nothing! Wrong – horseflies can detect carbon dioxide, so unless you plan to hold your breath until September, they’re coming for ya. But you can fight back against the horseflies, right? Sure, but be prepared to go to war, because horseflies are hardy insects that will pursue their quarry until they’re full or dead.
I can’t believe I’m describing a fly and not some sort of horror movie monster.
As annoying and terrifying as they may be, horseflies aren’t all bad. As proven by mosquitoes feeding bats, frogs, and dragonflies, even the most obnoxious arthropods still serve a purpose. On one hand, horseflies are pests that drain the blood of people and livestock, and are known to spread disease. On the other hand, they’re pollinators and a source of nutrition for birds. You can be the judge of whether the pros outweigh the cons, but never let it be said that horseflies are solely a nuisance.
Just as I’d rather live in a world with mosquitoes than a world without dragonflies, think of it this way: a few pesky horseflies means a few more birdsongs this summer.