This Is Why Water Striders Make Terrible Lifeguards | Deep Look
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- čas přidán 31. 07. 2017
- They may look serene as they glide across the surface of a stream, but don't be fooled by water striders. They're actually searching for prey for whom a babbling brook quickly becomes an inescapable death trap.
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With the drought officially over and the summer heat upon us, people all across California are heading outdoors. For many, that means a day on the river or relaxing by the lake. The wet winter means there’s plenty of habitat for one of nature’s most curious creatures.
Water striders, also called pond skaters, seem to defy gravity. You’ve probably seen them flitting across the water’s surface, dodging ripples as they patrol streams and quiet backwater eddies.
Scientists like David Hu at Georgia Institute of Technology study how water striders move and how they make their living as predators lurking on the water’s surface. It’s an amazing combination of biology and physics best understood by looking up close. Very close.
--- What are water striders?
The common water strider (Gerris lacustris) is an insect typically found in slowly moving freshwater streams and ponds. They are able to move on the water's surface without sinking. They are easy to spot because they create circular waves on the surface of the water.
--- How do water striders walk on water?
Water tends to stick to itself (cohesion), especially at the surface where it meets the air (surface tension). Water striders don’t weigh very much and they spread their weight out with their long legs. Striders are also covered in microscopic hairs called micro-setae that repel water. Instead of sinking into the water, their legs push down and create dimples.
--- What do water striders eat?
Water striders are predators and scavengers. They use their ability to walk on water to their advantage, primarily eating other insects that fall into the water at get trapped by the surface tension. A water strider uses its tube-shaped proboscis to penetrate their prey’s exoskeleton, inject digestive enzymes and suck out the prey’s pre-digested innards.
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#deeplook - Věda a technologie
Argh! It's a mayfly and not a caddisfly. Guess I was moving to fast on this one. The creek is full of caddisfly larvae and I assumed incorrectly that the adult was one too. Thanks for the catch. Glad you like the episode otherwise. - JoshC
Moving "too" fast. Two O's. By the way, the title of the video is weird. It could have been "This is Why Water Striders Can Walk on Water."
@HowSci, I think there's a line between correcting someone's Biology mistakes and grammar mistakes on a science video but oh man, opinions on how a science channel names their videos, my guy? Joshy boy did some good foreshadowing work to reel the kids in for some fun facts. Looks like the point.
Speaking of points, theirs touches on more than just their ability to walk on water. HOH, It's almost like the video used similes AND foreshadowing? Man, even most English majors would have at least appreciated that, but I guess you didn't.
Find me a fact only title other than Coyote Peterson's "I got bit" or "I got stung" videos that get 10 million views. This generation just wants science to be fun like it should be. ANYWAY.
Danny chill there buddy
Because just when you thought you were safe in the water from the cousins of the only creature on earth that you can't find a single endearing thing about - spiders. You're not. 😣
Hey Deep look, what would happen if you put soap in the water?
Jesus bugs
Can I have pancakes?
Aunt Jemima Exactly what I was about to say! They are like Jesus Christ in that manner. But would Jesus kill a swimmer if he/she could not float on water? Even I know he wouldn't do that! :)
So Jesus had hairs on his limbs that kept him afloat? The more you know.
Is this a southern thing or do yanks say it too.
Except if jesus was a vampire who attacked people while drowning.
Well I guess I have to fire my life guard who happens to be a water strider.
Too late
Better not sink or you know what
Job killing propaganda from the left as usual
Flamethrower time
"There's nothing in the rulebook that says a life guard can't be a water strider."
02:31 imagine if bugs could scream
Some bugs scream
They have no mouths so they cannot.
I imagine it. I imagine the voice of kevin hart screaming lol
Some roaches and caterpillars, most "singing" insects like cicadas and katydids, and a couple of others can "scream" or stridulate, the shock of the sound spooks most skittish predators (mainly birds and rodents). Water striders are pretty skittish, so I would assume a well placed screech would scare them off before they could bite too deep, then the insect could focus on reaching land.
@@cikame yea
"The water striders simply can't get wet."
* proceeds to spray the water strider with a hose*
XD
😂😂😂
Good one 👌🤣
Water Strider: *proceeds to be a spoon wannabe shooting water right back at ya*
wait, that's illegal.
XD
0:20
washing your hands in water only to realize they're covered in aquaphobic fluid
Hydrophobic
hydrophobic hairs
Washing your hands
Homophobic
I didn't know how water striders feed. I'll never look at them the same way again.
Yeah, I always thought they were cool floaty bugs, now they are cool floaty killer bugs.
Our work here is done.
Sir Cerolean I didn't even knew what a water strider was
Sir Cerolean same. Never thought about. I'd guess they were herbivorous and ate algae...but they're killers lol
I've never seen one...
Theres no water where I live.
Just imagine getting saved by a person who then sticks a straw into you, liquifies your insides, then drinks your insides.
N i c e
I would not know what on earth to explain to my lawyer
My dirty mind 🙄🙄
I already have a built in straw.
@@nahclassified284 bro
Put a little dish soap in the water and they will sink lol
Jarid Gaming wow
Can you explain why this would happen? What does it change about the water? Thanks!
Keaton Dean soap break the water surface tension -> sink :)
I heard that from hanimations 😂
The soap fills in the air pockets between the hair on their legs, and they "lose their floaties."
0:26
"These delicate little bugs have figured out how to master the elements"
Oh god they're tiny waterbenders
hahahahahaha2366 more like tiny avatars. They be keeping air between the water and themselves :P hihihi
@@ItsMe-mq5on Yeah, this bug accomplishes more in life than I do
hahahahahaha2366 same
nerd trying to roast be like
"your so hairy that when you're on water, you float"
"i dont understand"
"well, let me explain to you"
Lol
Lol
Lol
This comment that i make 2 years ago aint even funny for me anymore.
@꧂Alina Doggo꧁ lol
"Help! I fell in the water!"
*"Oh good dinner's ready."*
what happens when water striders are 'pushed under' do they just float back up?
+eyebal yes. The water does not stick.
Can they get back on their feet ?
Depp Look wht if you hold them underwater? WILL THEY DROWN?! Or will they just get around my hand and get back up?
@@fastwing3295 unlikely, they are too fast on water youll never catch a single one, what more lay your fingers
@@ElectreIsMore Once they float up they're on the water so yes.
Clearly their focusing their charka to walk on the water you guys need to do some better research smh
I wonder how they do their jutsus?
They must be extremely efficient at ninjutsu with an extra pair of arms
😂😂😂
WATER STYLE DRAGON STORM JUTSU
Maybe Shino knows
"The water striders simply can't get wet."
Waterstrider husband : ⊙﹏⊙
XD you deserve a like
😨
😏😏😏😏😏😏😏😏😏😏😏
I love that everyone in the comments has such a great sense of humor 😂
Lol so true 😂😂
So if I shave a water strider and glue its hair on my feet I can walk on water
Fallen Ryan well... yes.
If ur light enough
well yes but actully...no
prove it
So that's how Jesus walks on water.
I've learned so much from this channel!
So glad to hear that!
Yes what a beautiful way to explain some of the theory behind surface tension!
Now you can find job in bugs study
I think this is my new favorite youtube channel. My favorite thing to look at is a zoom in on what's going on in the world - not always a very marketable interest, but these guys let me really get hyped about a bug that can walk on water
_They're making it sound like other bugs can be life guards-_
The video quality is amazing... My PC can barely run videos at 1080p and this supports up to 2160p wow
I know but it looks kinda weird comparing 1080 to 4k... or at least to me.
Proximity I'm sorry you've not come out of the early 2000's technology wise.
idk why but the max for me is 1440p :(
i want the 4k goodness
It almost looks like those info vids you would watch at the planetarium
it's quite unlikely that you have a 4k screen anyways, so it doesn't really matter.
I have just literally discovered this channel and all of the content has been top notch! keep up the good work because this is a great channel i've seen in a while that i actually enjoy out of my recommended lol.
Thanks!
Deep Look we really hope your channel grows so that you can make even more vids!
Even Saitama approves. That's how you now you have a good. channel.
One Pun Man
I hope you don't get startled and punch your phone.
ive seen you before
jesus: *dies for 3 days*
water striders: im about to steal this mans whole career
I don't get it.
Wait, so they’re dead too?
Tao Ping I’m too lazy to explain it to you, but I’ll be sure to notify any kids on youtube that whooooshing is dead
Because jesus walked on water duhh
@@taoping6451 jesus walked on water
Bettle: help i cant swim
Water strider: Im coming to save you
Water strider touch bettle
Bettle is saved :)
Learn to spell before you annoy my brain it’s Beetle*
Aw come on no need to be so salty
@@omays9658 shut up Roblox player
I’m already Sans Undertale that comment is 2 months old...
@@omays9658 and you still haven't changed, so what?
Only on Deep Look, I set the video quality to the highest 👍
Thanks!
Deep Look no, thank you
what kind of internet do you have?
IT'S SURSKIT FROM POKEMON EMERALD
surskit was inspired by this bug in the first place
Ahshi I know
ǝbop uʍop ǝpısdn WHAT ARE YOUR PROFILE NAME SAYING
sans the skeleton
flip it upside down
Well you guys changed your username :0
Lauren's voice is so pleasing to the ears. I'm in love with her voice.
I literally found this channel yesterday and I can’t stop watching your videos😂
Thanks!
If you're not watching deep look in hd then you're not watching deep look at all
Indeed
" They have tiny hairs that are called Micro-setae"
Me: The heart of Tafiti?
"I *KNOW* you see that subscribe button there"
Just put all of us in check
Water Strider: **Floats on water**
Water: *”Soap go BRRRRR”*
This channel gives so much love to insects and other arthropods and it makes me so happy as an entomology major. Thank you guys on the Deep Look team so much for such high quality content with such high production value. You guys are the absolute best.
Thank you, Ken! keep up the good work of entomology.
Half life 3 attack of the striders
PUROOOO sup my fellow changed fan
SSSSSSTRIIIIIIIIDEEEEEEEEEEEEEERR!
*brings truck of Mangusson devices*
I Fear No Man...
But That Thing
*Water Striders*
_Its Scare's Me_
Same man same and people swim in lakes and river's to.....
I swear, it’s like Ze Frank and Vsauce had a baby and this Chanel is the result. Good humour and I leave feeling enriched ina odd way.
Educational shows and channels are the only people can stand by and watch something die and get praise.
.. Wow.. Your personality in this comment really suits your Daniel profile pic.
When I was a kid, I played near a ditch that usually had water with the level dependent on the rainfall. There were water-striders, crayfish, occasionally frogs/tadpoles and other water 'bugs' living there. I watched the striders glide across the surface and just accepted it as something to see while growing up. Now, I get the facts about how the amazing critters 'worked'! Fantastic!
Sing along with me
" row row row your boat gently down the stream"
Everybody!😂😂🤣🤣
I love this channel. I can find anything which i seek for. Especially uncommon content.
That feeding scene gave me chills
Resistance Rebel: STRIDEEEER! (Remember Half Life 2?)
Polandball #StopNazis COMBINE!!
Follow Freeman!
Hey it's Freeman! Let's follow him!
I love this channel ! I like learning about insects they are actually really cool.
2:35 Surskit used Giga Drain!
That feeling when A new Deep Look video comes on.
Still better vampires than Edward Cullen.
Do bugs have blood?
Hemolymph. Basically blood but not used for breathing.
@@whatever6874 yes, but very different from us
I LOVE HOW SIMPLE YOU GUYS EXPLAIN SCIENCE
this channel has a gift how they can pack all that infomation into short segments its amazing they say only what needs to be said unlike other channels who blabber on oh and they make it fun :D
One of the best things on YT. I never walk away without a pervasive sense of awe watching these vids.
I've always imagined these insects as simple prey, not predator. Thank you for the insight Deep Look!
Ditto, and I just watched the newest one where they show them eating small fish!
I love this channel so much I could watch it for a week straight!
That's amazing! It's almost like the water is jelly!!
geez.. nature you did it again ..
No thanks Deep Look I'm not that into Half-Life.
Those poor things from HL2 were ripped from their natural habitat, and forcefully turned into war machines.
SamVision yeah :(
awww
now im not shooting striders with rpgs
@@semvision Wait, what was?
Everybody gangsta til bugs start walkin (on water!)
Watched your water bugs video. Remembered about water striders. Searched for the first video that came up. Ended up here.
When I was child, managed to catch one. That's when I learned that they bite!
beach swimmer: HELP ME I'M DROWNING MR. LIFE GUARD!!!!
life guard: Ok... drinks beach swimmer
beach swimmer: I JUST WANTED TO GO TO THE BEACH DUDE!!!
1:39 that's what my gf said right before she dumped me :/
Marc 😂
🤣
👌😂🔫
At least you had one
"My life is miserable" jokes never get old.
Wow! These videos look amazing! And I was accidentally watching them on 360p!
Jesus: I am the only one who can walk on water.
Water Stiders: Hold my holy water.
Whoa! An upload! I stopped everything to watch this, haha!
Same
I thought it was called pond skaters
That is also a common name for them.
Oh okay...
Where I’m from we call the water skeeters
Kamu more like water yeeters
Fantastic photography!
2:20 That change in focus was amazing lol.
The water striders are secretly ninjas using jutsu
They are using Hamon™ to walk on water
Neat vid! The drowning insect was a mayfly, not a caddisfly.
Mayflys have 2 long tails at the end of them. It's a Caddisfly.
This individual has lost its cerci, but you can tell it is a mayfly based on the wing venation. Mayflies have more "primitive" wings like dragonflies, which are clear with lots of veins. Caddisflies are more closely related to moths, having reduced wing venation and wings covered in hairs.
Well I wouldn't know about any of that but if you say so
argh, yeah you're right... It is a mayfly and not a caddisfly. Guess I was moving too fast on that one. The creek is full of caddisfly larvae and I assumed incorrectly that the adult was one too. Thanks for the catch. Glad you like the episode otherwise. - JoshC
Caddicarus Fly
Too awesome stuff ! thanks for it. Like really thanks for it.
deep look is so cool keep the videos coming
You're the best deeplook! I mean that sincerely.
The photography is just so good :)
A great arthropod on the hunt for his meal! Good footage
I really enjoy these vids so far! My sister loves them 2!
Amazing video! Great channel! 👍
2:05 "OH SHI- Oh it's just you Jeff, don't sneak up on me like that! you made me jump!"
That shot at 2:19 was amazing! Proper horror-movie rack focus shot. How many attempts it it take to get the water strider to cooperate with the camera operator?
Thank you for making this videos . It answers to all of my questions finally i know what is the name btw theres alot of water striders in our pond
"oh thank bug, someone has come to...h-hey whats that.."
"They can't get wet"
*Pours a bucket of water on one*
Mission completed
Idk if that would actually work. The might die from the weight of the water, or just float away with the current.
im a kid and im happy this science channel is easy to understand 😊
They're so cute, I love watching them swims
What if they lay on their back?
This is an interesting idea! I believe they have significantly more surface area on their legs and feet to help with the interactions of the water surface. I am no expert though!
They actually flip over to go underwater, escaping predators on the surface like birds and large damselflies.
Striders coming trough what used to be the sawmill!!
After rewatching, the caddisfly has ironically become stuck on water. It lived most of its life underwater and emerge on the water's surface as an adult.
Just had a funny thought when that strider bug saw that catus fly got stuck in the water.
Strider bug: Hello there, welcome to the pond, care for a swim (yum yum.) Lololol
“They’re literally walking on water”
Me- JESUS
insects world is a nightmarish world to me
The insect era is coming soon - after humans wipe themselves out like the dinosaurs.
The insect era happened before the dinosaurs. Not saying that it won't happen again, especially considering the higher carbon content in the environment from pollution.
All they need is for the plants to make a comeback from deforestation, processing the massive amounts of carbon dioxide we produced into oxygen, both helping the larger insects breath and making them grow, and they will own the world again.
They are known as "Water Boatmen" here in the UK. Great video. Thank you
When ever for some reason i see animals fight i just like it idk why i just enjoy it, ive watched about 12 strait vids from thia channel because of that
the non-polar, structures around the body of the strider repels the polar +/- charged water away. The same principle as oil and water not mixing
How to get rid of dust bugs
cough cough Half Life 3 confirmed
The water-repelling microsettae on these water striders reminds me of the hydrophobicity of the chitinous casing of a Daphnia ephippium!
thanks and wp for the documentary..
actually, we have a subject in our engineering course which is surface tension and this is a very much pretty good example of it. :)
2:21 Strider: ooOoooOo luuunnnch has come Oh its always make best move to trap them with pure wattah..
Half-Life 2 | Episode 3 - Real Life is on it's way.
Seems like a great engineering challenge. Imagine how fast a boat could go w/so little friction.
...this is from 6 years ago? Better late than never!
HAHA it's actually a mayfly, well we all make mistakes right
Pyro The Dragon? More like SPYRO the Dragon!
I will leave now
REAPER THE BEAR he was talking about the bug that was stuck in the water
REAPER THE BEAR he was talking about the bug who got stuck u burnt piece of celery
REAPER THE BEAR probably the best insult I’ve heard 😂
Furs assemble
Keep your feets dry lmao
Wong Ke Siang xDD
It's just like a spider, except the surface of the water serves as a ready-made web. That's actually really cool.
Hadn't thought about it that way. interesting observation.
2:21 me when my best friend leaves any food on their plate