Dobsonfly (Corydalus cornutus) The Adult stage of the aquatic hellgrammite. Order Megaloptera.
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- เผยแพร่เมื่อ 6 ก.ค. 2020
- In this video I hold and formidable-looking adult male Dobsonfly (Corydalus cornutus) in my hand! The males live only three days and are nocturnal so adults are rarely seen! While showing off this giant insect, one of the biggest in North America, I tell the story of its life history. What they eat, where they live, and the life cycle from egg to voracious aquatic predator larva to pupa on the banks of rivers to finally a winged adult. Larva spend up to three years in the aquatic stage and are indicators of excellent river water quality. The females also live only briefly, two weeks, long enough to mate and lay eggs. Check out the story of this fascinating insect species.
You are pretty good at this and I enjoy learning about what's around my sphere of life.
Thank you so much DAN!! this means a lot to me! Its why I do this!
I just saw a larva dobsonfly for the first time the other day. Figured id learn about it. Oddly though it was coming out of the river by itself, middle of the day, and no thunderstorm.
Great observation! Thanks for sharing!
I was at a Master Gardener College at Virginia Tech a few years ago and found one on the outside wall of the building where we were meeting. It was a female according to the many insect-obsessed people that were there!
Ha! Insect obsessed! Lol! Thanks for sharing YOUR experience! (Female adults don't have the big jaws...but can bite! 😉
Today I saw this mega insect, near the swimming pool, here at home... I was scared... I researched it and then watched your video. I found out it's a male. Very interesting, thanks for the information. I am Brazilian. 🇧🇷
Glad I could help!...so you found it in Brazil? That is sooooooo fascinating!
at camp two weeks ago, i was shocked to see one of these next to the door of my cabin under the light. i pet it and i was eager to look up what it was (when i got back home) and turns out it was a female dobsonfly. cool creatures. that was the first time i'd ever seen one.
They really are so cool! I am sure you must have been surprised! They look practically prehistoric! So glad you had a chance to experience that! 👍😎🏆
I just found one of these in NH! A very aggressive female. Fascinating
Cool! yes the females can bite!! did she try to bite you?
@@natureatyourdoor Hi there! Yes, she did try to bite me. I had sandals on and to my surprise she was coming after my toes 😧 Very aggressive and very quick.
Thanks
You are welcome Oleg Dubko. Thanks for your support!
I woke up with an adult male dobsonfly on my window right above my bed. It freaked me out, but I found this video very informative! It’s very cool to watch. It’s morning and it’s still there. I hope it doesn’t die on my window 🤪
They are biggest scariest looking bug I think!
What an honor
👍😁
I was briefly a student of yours. Tiina Russ told me you had a channel and I have subscribed. And from what I understand I need to comment to draw TH-cam's attention.
:-)
We found a male dobsonfly on the outside of our store in Kersey, Pennsylvania. On approaching him, he turned his head and looked at me! That freaked me out. I took a picture and ran away.
But thanks to your video and a few others I won't be so terrified if I'm lucky enough to see another. I may have a chance as our store is right next to a little pond.
Lololol! Great story...i am still smiling! I hope you will get to see some more...calmly! 😅😅😅
They live 3 years as a larvae, but only 3 days as a fly?
Yes. Exactly..crazy right?
Used to see lots of those while fishing at night on the Cumberland river in E. Kentucky. They were attracted to our lanterns. We called them flying grampus.
Ha! Cool name!
About two weeks ago I saw a fishing video where they used helgramites and they showed the adult dobsonfly. Never seen them at all than I saw a fucking adult fenale dobsonfly like two days ago. Crazy coincidence.
Very cool you saw an adult female! Even more cool btw you can say off the cuff it was a female! Bet you will see more! Thanks for sharing here with our NAYD learning community! I hope to hear from you again...and uh..btw...please leave out any emotive adjectives if it does hamper your free expression. I have a lot of kids and homeschoolers that participate on my channel! Thank you Deandre!
There was a male on the side of my parents house. We put him in a insect box but the next morning he was dead
Oh no! So sad. The males are said to live only 3 days! Sorry about your experience but likely just his time! They have such amazing "jaws"!
omg. Now I know what that is. I usually see 2 or 3 a year at work (Frederick MD) attached to the side of our building. We have a small creek about a half mile away. I kept thinking it was some prehistoric bug.
Ha exactly! Too funny ..the adult I found for the episode was on the side of a building too...a jewelry store where a former student works who called me! Same...the creek they would live in was miles away. and yes...they do look prehistoric! You gotta ck out my video on the larva!!!hellgramites!! click here: th-cam.com/video/-33BbRiRysw/w-d-xo.html
I live in Pennsylvania and one day I saw a bug that looked nearly identical to this on my dresser. The shape of it was identical to a dobsonfly, but it had shorter mandibles like a female. Unlike a dobsonfly though it was a rusty red-orange color, made a loud screeching sound, and it was MASSIVE! It was bigger than my hand and had to be over a foot long.
I was terrified by the size of it, plus the loud screeching it was making, and the fact that it was in my house. I grabbed an aquarium net (wasn't even big enough to catch it), and managed to get it outside. I tossed the net on the ground and squished it, and HUNDREDS of round red eggs came out of it. They looked like salmon eggs.
Now I have no idea what kind of bug it was, but it looked nearly identical to the dobsonfly except for the color, size, and I don't think dobsonflies screech. Kind of regret squishing it now that I look back because it was really unique and it would have been interesting to try and get it identified.
You have my curiosity peaked! I wonder what it was?
@@natureatyourdoorI wonder as well
You should have got a shot of the egg sacks. I think your made for this. You were very theatrical when you taught me. You seem reserved here. I don't do youtube. But from what I've seen you should be loud and move a lot. Make it exciting for a younger class of kids and keep it informitive for us old folks.
Ah! ha! a former student, hey! I never watched a youtube video before I started either. A teacher friend suggested I do this and it took off on its own! so..I have only been doing this for 3 months...I am just starting my "library of stuff....I found the egg sacks on rocks two week s after I did this video... I try to talk as if to a group of middle schoolers or yougers...but lots of adults love watching my channel!!!
What do they eat while they live in the river?
Everything! They are the top predator of the invertebrate world and ferocious predators as larva. They will virtually eat anything they can subdue with their powerful jaws. See episode on the larva: th-cam.com/video/-33BbRiRysw/w-d-xo.html I think one of my best videos!
More comments. I enjoyed the ghost pipe video. Very inciteful. I'll have to blow up the other videos at a later date. You keep plugging
Dan.... I am trying to place you... I recall tall, thin blonde hair ...friend of bill's right.... 35 years of student all run together in my brain! toooooooo fun you are BACK IN MY classroom! Ha!
I just caught a monster one of these here in central Missouri, are they all over the USA?
They have a wide range....but need clean water!
@@natureatyourdoor Im surprised to see him here then lol! There is a creek by my house but its not clean! I assume maybe for him it was, I kept him.....He lived 2 days, I just was in awe with him and I feel like I got to see and share a moment with a rare species! I love when mother nature provides such moments. I think I got a record holder lol! He is huge, If you would like a pic let me know where I can send it, IF not I undrstand..thanks for all you do!! (also i take it I found a male do to his size from what I have researched? )
@@SilverBull30 you can share photos with me under visitor posts on my Nature at Your Door Facebook page!
@@SilverBull30that's cool! I would like to see those pics as well
I found two in VA.
Nice! I am always excited when I see one! Congrats! Thanks for sharing with me!
I saw three in a span of 5 hours
Awesome!
I just saw one on a hotel window! An adult male by the way.
Wow! That is pretty awesome and cool you could id it's sex! What floor of hotel and what city did you see it! So cool! 😎
@@natureatyourdoor In Harrisburg Pennsylvania!
@@kahanuermeyas-tulu4056 fascinating! I drove through there not long ago and marveled how beautiful the river was on road we followed north! Thanks!
@@natureatyourdoor Me too!
My friend has a dead one on her self that she found on her floor. Here in Oneonta NY.
The adults live only a few days! Neat find!
@@natureatyourdoor it's female too. The pinchers are short.
@@alunarosaadmoramelullaby6314 exactly..and the females can bite!
This is pretty crazy. I came here to ask you to tell me hellgrammites.
Ha! Perfect!
Encontré un insecto de estos muertos en la parrilla delantera de un carro. Comencé a buscar que ibsecto es. Y llegué a este vídeo, de verdad que este insecto es aterrador .😢
Ha! It's not so bad! Where did you find it?
I am glad you found my video! 🙂
Lo encontré en Barranquilla una ciudad con clima tropical al norte de Colombia.
Or just a live trap any where and and use that.
Live trap? Do you mean for the aquatic stage? Tell me more... How do yo live trap! Thanks for sharing your thoughts!!!!!
Comments and likes. The algorythym. Maybe try to catch a fish down there in the river. It could get my cousins and nephews interested to learn about a bluegill. Or better yet a live snare type thing if you don't want to injure the fish.
Ha! I am cool with fishing! I actually have a trout pond here in floyd. Stay tuned. I keep finding snakes, and mushrooms, and insects...need to get some balance in my life and do more fishing!!
"Hellgrammite larva" is redundant.
I feel like you're torturing that male, given that he has only 3 days to live and he only lives for one thing.
I didnt keep him long.
w a i t t h e s e t h i n g s a r e i n v i r g i n i a ? ? ?
Ha! Yes they are! Millions of them!
@@natureatyourdoor *internal screaming*
@@ManohangProto I just burst out laughing again! 😃 thank you for making me SMILE!!!
@@natureatyourdoor you're welcome but
*i t h i n k i m g o n n a m o v e*
*c o n t i n e n t s*
*s o o n*
He only lives for 3 days and now you hold him captive for those three days so now you prevent him from getting laid and a chance to produce his own children! Shame on you for this, man! That ain’t right what you did to that dude!
Good point..he was set free alive...did I really keep him for 3 days..I usually release thar day or the day after filming!
Let the fly free what you doing is not good for the 🪰
Of course! if you watch some of my videos I always release my subjects for education exactly in the place that I found them shortly after filming! I DO appreciate your concern but please know that my goal IS to teach respect for all living things and to try to engage people in appreciating nature! And hopefully that influences life style and support of regulations and programs to protect nature!! Thank you for pointing that out to all my viewers! I hope you will check out my other videos and see if I dont model good stewardship of living things.