The Hellgrammite: You Won't Believe this Strange Insect Exists!

#insect #creepy #nightmare
Life in a flowing river can be tough, especially without being a strong swimmer like trout. Rivers, though, are home to a great diversity of macroinvertebrates; arthropods that can be easily seen with the naked eye if you look for them. Most are rather strange looking, and some have truly nightmarish features. Few though are as creepy as the larvae of megalopterans, known as hellgrammites.
The Helgramites most noticeable feature upon inspection however are the fearsome mandibles, the mandibles of a carnivore. They feed on a variety of small aquatic invertebrates, which they snatch up with these powerful jaws. When confronted by a predator or another hellgramite they can use them for defense. Despite their monstrous appearance, helgramites are rather delicate creatures that require prisine, well oxygenated water. They are generally intolerant of pollution, and so their presence or absence can indicate the health of a river or stream. It takes years for hellgrammites to grow to the size of these individuals, and this long maturation makes them particularly vulnerable to pollution or even over collection.
Megaloptera are fascinating because they are among the most basal lineage of holometabolous insects, that being they go through a distinctive larval, pupal, and adult stage, but are not as derived as more famous examples of insects like this. When a hellgrammite has grown enough and is ready to mature it leaves the water and goes into a non-feeding pupal stage in the moist soil under a rock or log. Unlike the chrysalis of a butterfly however, this pupa retains the legs and so are motile. Eventually, the adult insect is ready to emerge. Known commonly as a dobsonfly, they are very large impressive flying insects.
Sources
Hoell, H. V.; Doyen, J. T. & Purcell, A. H. (1998). Introduction to Insect Biology and Diversity (2nd ed.). Oxford University Press. pp. 441-443. ISBN 0-19-510033-6.
Chestnut;, C. (2013, December 26). Creature Feature: Hellgrammites, not the prettiest creatures in Southwest Florida. Retrieved September 10, 2020, from www.news-press.com/story/news...
Hall, D. W. (2007, July). Eastern Dobsonfly. Retrieved September 10, 2020, from entnemdept.ufl.edu/creatures/m...
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Myst on the Moor by Kevin MacLeod
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Пікірлер: 57

  • @FallsThrough113
    @FallsThrough1135 ай бұрын

    We would catch them in the river by my summer camp as a kid. They were so creepy yet fascinating, we put about 6 of them together in a very large fish tank with a bunch of rocks for them to hide under. 2 days later there was only two left and the two remaining were missing legs and injured. They had killed the smaller ones and then went to separate rocks on opposite sides of the tank to avoid each other.

  • @TheWildlifeBrothers
    @TheWildlifeBrothers2 жыл бұрын

    Hellgrammites are absolutely fascinating, some of my favorite macroinvertebrates to come across when out exploring creeks. You got some planet earth level shots here, but that’s to be expected with your level of production quality. Great overview of a really cool species, nice work! - Harrison and Evan

  • @Ecotasia

    @Ecotasia

    2 жыл бұрын

    It was really fun to set up an aquarium and make this video, they are such interesting animals to watch

  • @vinista256
    @vinista2569 күн бұрын

    I saw a female on my car last night and needed help from “All Bugs Go to Kevin” to identify it. I’m really happy to know that her presence is a sign of health in the nearby river, which has had some issues in the past. Thank you!

  • @Dubs22005
    @Dubs22005 Жыл бұрын

    i came here directly from a twilight zone episode

  • @Soggys0up85

    @Soggys0up85

    Жыл бұрын

    Which one?

  • @katherinej298
    @katherinej2983 жыл бұрын

    Really neat mini-doc! Those are some gnarly-looking creatures, and I loved learning more about them!

  • @Ecotasia

    @Ecotasia

    2 жыл бұрын

    gnarly, but harmless

  • @dougbrown04
    @dougbrown04 Жыл бұрын

    And they are mean as a snake. One gets a hold of you, you'll never forget it

  • @TsunauticusIV

    @TsunauticusIV

    Жыл бұрын

    I spent my youth catching them in the rivers and selling them as fishing bait. They can bite but it’s not that bad. Been bitten hundreds of times and their bite isn’t as bad as most people think. Maybe I was just tough but it wasn’t ever a big deal when they bit.

  • @donaldcarlson-dr8tw
    @donaldcarlson-dr8tw8 ай бұрын

    I grew up using these for some large hard to catch brown and rainbow trout in Massachusetts . I would take a small window screen and place it downstream and turn rocks in a quickly flowing river and get a bunch to use most were 2inches long and larger ! I fished the Nissitisett and Squanacook rivers and always caught some very nice trout! This video is a great one ,thank you !

  • @284Winchester
    @284Winchester Жыл бұрын

    Thank you! Very informative

  • @mikemashburn155
    @mikemashburn1552 жыл бұрын

    Great mini documentary, camera work is spot-on. Thanks for sharing this.

  • @Ecotasia

    @Ecotasia

    2 жыл бұрын

    Thanks!

  • @BioBush
    @BioBush3 жыл бұрын

    Wow, what an interesting bug! I kept thinking it looks like something designed in Spore. Especially the adults. It looks like you set up an aquarium for these animals, because you got some really good footage. Thanks for doing all that work!

  • @Ecotasia

    @Ecotasia

    2 жыл бұрын

    Yeah I had fun with the aquarium set up, was really able to go all out for this video

  • @nickjackson7475
    @nickjackson74759 ай бұрын

    My friend and I discovered one while flipping rocks for worms before we knew they existed, it was definitely a creepy sight! We were very careful to avoid their nasty mandibles

  • @invaderzim133
    @invaderzim1332 жыл бұрын

    Interesting stuff. Thanks for the effort

  • @benfranks6375
    @benfranks6375 Жыл бұрын

    Great video! Thank you.

  • @Ecotasia

    @Ecotasia

    Жыл бұрын

    Glad you liked it!

  • @jreilly2213
    @jreilly22132 жыл бұрын

    Amazing video! Grew up catching these for bait along the Delaware river

  • @yeshuaadoneinu436
    @yeshuaadoneinu436 Жыл бұрын

    thanks great video

  • @Ecotasia

    @Ecotasia

    Жыл бұрын

    Glad you enjoyed it

  • @naturewithgabe
    @naturewithgabe3 жыл бұрын

    Many turtles love to eat them, too. Neat video!

  • @Ecotasia

    @Ecotasia

    2 жыл бұрын

    I bet they do

  • @Mr_Itchy
    @Mr_Itchy Жыл бұрын

    my brother got one of the things in his shoe while we were swimming in a creek, it bit the piss out of him.

  • @shawneldridge4465
    @shawneldridge4465 Жыл бұрын

    hellgrammites make good trout bait. Just be careful cuz they will bite you, especially when you're trying to hook them up onto your hook. So this is why I started using the Uncle Buck's hellgrammite pre-regged jigs for fishing. Much safer. But still these insects are very interesting and very cool.

  • @basedbro2578

    @basedbro2578

    Жыл бұрын

    The nikko hellgramites are great soft plastic to use too

  • @billquantrill4960

    @billquantrill4960

    Ай бұрын

    @@basedbro2578 And a lot less creepy. Lol.

  • @sulisangtam6186
    @sulisangtam6186 Жыл бұрын

    Hellgramites is delicious we used to eat this insect and it's very common in our place and it's expensive too in market

  • @Ecotasia

    @Ecotasia

    Жыл бұрын

    I guess that is why smell bad, to keep predators away from the tasty bug.

  • @justcallmeSheriff
    @justcallmeSheriff4 ай бұрын

    I'd love to get some hellgrammites for the nature center I work at!

  • @Ecotasia

    @Ecotasia

    4 ай бұрын

    You should! Not sure on how they do in captivity long term, as I only had them for a few hours

  • @Bullzak_83
    @Bullzak_832 жыл бұрын

    Grew up looking for these bad boys, the only fish bait that would bite back..

  • @windsorwolf7162
    @windsorwolf7162 Жыл бұрын

    It looks a lot like a centipede

  • @Slimothy-James.
    @Slimothy-James.9 ай бұрын

    Seen one for the first time last summer and I can safely say that these things need to be extinct lol. Absolutely terrifying looking creatures

  • @Kami43644
    @Kami43644 Жыл бұрын

    Never going swimming again 💔

  • @shanelogan630
    @shanelogan630 Жыл бұрын

    I wanna do reptile shows and get some of these as pets. Aquatic insects, spiders and resources are some of the most fascinating to me

  • @KahlessTheUnforgettable

    @KahlessTheUnforgettable

    Жыл бұрын

    Did you hear the part where he said they tend to be over harvested? These would not make suitable pets. Get a dog.

  • @murphykenji
    @murphykenji2 жыл бұрын

    Found a dobson fly in the parking lot and though if was a sign of the last days. 😁😆😅

  • @Ecotasia

    @Ecotasia

    2 жыл бұрын

    They are pretty intimidating, but completely harmless

  • @hemlockridgemtb4958

    @hemlockridgemtb4958

    Жыл бұрын

    @@Ecotasiawait the Dobson flies can’t bite you?? I’ve been but by helgramites and thought they could do the same thing

  • @Ecotasia

    @Ecotasia

    11 ай бұрын

    @@hemlockridgemtb4958 it has been a minute since I read up on if female dobsonflies retained the bite of their larval form, I do know tye males do not.

  • @Brydav_Massbear
    @Brydav_Massbear Жыл бұрын

    Are these guys related to antlions?

  • @Ecotasia

    @Ecotasia

    10 ай бұрын

    sort of, but also not really, insect taxonomy is complicated

  • @yingmin1636
    @yingmin16362 жыл бұрын

    I might say that referring to this as an alien in a literal way may be misleading. This insect, by the way is more interesting than it is scary, so if you really want to educate people about this insect and make them like it, why refer to with words like “creepy” and “nightmare” to describe it?

  • @Ecotasia

    @Ecotasia

    2 жыл бұрын

    No I agree, really good points. I am really trying to work out the ethics of sensationalism and thinking more about what words are used and how, probably should rework the title a bit, I went a little far. Thank you for the critique.

  • @yingmin1636

    @yingmin1636

    2 жыл бұрын

    @@Ecotasia Thank you very much!

  • @vDuzz
    @vDuzz3 жыл бұрын

    I'd love to see some in the wild some time

  • @Ecotasia

    @Ecotasia

    2 жыл бұрын

    Just go out and flip some rocks in a stream, actually they can be a bit hard to find though

  • @CombatCoulture
    @CombatCoulture Жыл бұрын

    Great bait

  • @wynnnnnnn5227
    @wynnnnnnn52272 жыл бұрын

    159th

  • @davidcarr9131
    @davidcarr9131 Жыл бұрын

    The best bait for big bass, hands down!!

  • @michaelvoorhees5978
    @michaelvoorhees5978 Жыл бұрын

    Do these start out short and fat? Emden I was a kid we would find something similar but they were not long and thin and didn't have appendages down their side. We called them water spiders. They were ugly and creepy looking!! Lol I think maybe they turn into dragon flies. I'll look that up

  • @Ecotasia

    @Ecotasia

    Жыл бұрын

    Yeah that sounds like a dragonfly, these just go from small hellgrammites to big ones

  • @michaelvoorhees5978

    @michaelvoorhees5978

    Жыл бұрын

    @@Ecotasia yeah it was a dragonfly nymph

  • @Arjun-nr6vt
    @Arjun-nr6vt9 ай бұрын

    From instagram feed to a documentary🫠