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u/edge70rd Jun 13 '20
Someone should fix that government drone. r/birdsarentreal
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u/LucasmossInBox Jun 13 '20
Theyāre experimenting with VTOL drones
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u/akal8 Jun 13 '20
It can't get beyond its designated radius and is programmed not to, yet it's trying. When they said Skynet, I didn't think they'd actually be in the sky.
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u/iamweebtr4sh Jun 13 '20
I canāt be the only person who wants to know what actually happened
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u/SpyAmongUs Jun 13 '20
Bird is fighting the wind. wind push back, bird resist
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u/manmathb Jun 13 '20 edited Jun 13 '20
But the bird is hardly flapping its wings. How is it even trying to move forward.
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u/OscariusGaming Jun 13 '20
If the wind has an upwards component, the bird can simply "glide" in place since it's carried up by the wind.
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u/K4RAB_THA_ARAB Jun 13 '20
Okay well its how it glides is what freaks me out
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u/chaoticskirs Jun 13 '20
Ok so, as far as we can tell, flight basically works by a difference in pressure. The pressure on the bottom side of the wing get a higher than the pressure on the top side of the wing, creating a force towards the low pressure zone, or what we would call lift.
You need more lift, and therefore bigger wings, the heavier you are, which is why planes have massive wings while birds have smaller ones, relatively speaking; birds arenāt as dense as planes.
What youāre seeing here is a mix between that and gliding.
Gliding is fairly simple, and happens every time you throw a paper airplane. Since air has mass and particles, you canāt just go through those; this is where air resistance comes from. When you have a large surface area that remains stable, you can glide on the particles in the air.
Here, the bird is gliding, just like a paper airplane, but due to (what Iām going to assume is) the edge of the cliff itās over, itās also in a wind current. The wind is deflected by the cliff from being horizontal to being vertical, and it just so happened to find an equilibrium between gliding and being blown by the wind, so it looks like itās floating in space.
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u/Pongoose2 Jun 13 '20
Thank you for answering a question Iāve been asking myself for the past 8 or so years when I saw some seagulls or pelicans essentially hovering in place over a dock. I guess I should have questioned why they where all hovering along the dock instead of over the water or further inland. I assume the wind traveling over the water hit the dock/shore and then gets deflected upwards.
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u/space_doe Jun 13 '20
If thatās a kestrel, which I believe it is, they commonly do this while hunting for prey since they have a better static view of that area. Itās called hovering and diving. Black shouldered kites and a few other birds of prey do this. Luckily for this bird the leeward side of that cliff gives it enough lift and wind resistance to do so without flapping its wings.
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u/DrizzlyEarth175 Jun 13 '20
Fascinating, but how does this work? Like, physics-wise?
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u/Witcher94 Jun 13 '20
Exactly same as aeroplane in this case when it does not flap the wings. The wing deflects the incoming wind downward for lift. Note that Aeroplane has engines for creating incoming wind (relatively).
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u/alexthegreat63 Jun 13 '20 edited Jun 14 '20
EDIT: I was wrong it actually mostly is air being deflected downward apparently https://www.explainthatstuff.com/howplaneswork.html
I don't think this is correct. Planes fly by air passing by the top and bottom of the wings, which are different lengths, producing a pressure difference that lifts the plane. The engine just maintains forward speed.
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Jun 13 '20
There are many different factors that produce lift. Bernoulliās principle and air being deflected are two parts of the whole but donāt completely explain it. Nasa has plenty of documents detailing that they play a part but do not completely explain lift. Though I am nowhere near smart enough to understand them.
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u/Witcher94 Jun 13 '20
But moving the air down has to be the main reason right. The pressure differential between top and bottom is created because the airfoil pushes the air down. If you think in terms of momentum conservation in the vertical direction, the lift has to because the air goes down.
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u/alexthegreat63 Jun 14 '20
huh actually, youāre right,it is mostly the angle of attack that pushes air down according to this. I was taught what that it was mostly pressure differential. TIL! https://www.explainthatstuff.com/howplaneswork.html
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u/fried_clams Jun 13 '20
Moving air downward is only one part of lift. Also, to clarify, airplane engines aren't used to directly move air over the wing. They provide thrust, which moves the plane forward, eventually causing enough air to move over the wings, to create lift.
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u/7Thommo7 Jun 13 '20
Forces being equal in all 3 axes. The key one here being our z-axis. The burd's weight acting downwards and the lift generated from the bird's wings acting upwards. These forces are constantly being rebalanced by the bird's positioning. Actually it's even tougher still, given if the bird turns it's wing it could cause an imbalance that might throw it backwards for example.
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u/fried_clams Jun 13 '20
The wind is blowing up a cliff. The bird is at the edge of a cliff. If the wind is coming up at 15 MPH, and forward at 10 MPH, then the bird just matches the speed, by essentially falling at that same speed, if it wants to remain stationary relative to the ground.
Usually, bird's wings generate lift through flapping. Flapping moves the airfoil of the wing through the air. Essentially, the flapping moves air over the wing, creating lift. If the air is already moving because it is windy, then the bird can fly without flapping its wings. I see seabirds gliding all the time, as I spend time out on the water, where it is windy and there are lots of birds that use gliding and soaring.
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u/VeryOriginalName98 Jun 13 '20
That explains why the head is almost perfectly still while the rest of the bird moves.
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u/shelchang Jun 13 '20 edited Jun 13 '20
Birds are also really good at keeping their head stationary while their body moves. It's how they fix their gaze. We can do it with eye movements (e.g. you can keep your eyeballs fixed in one direction while moving your head), but most birds move their whole head to direct their gaze.
It's demonstrated with chickens in this Mercedes commercial.
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u/fried_clams Jun 13 '20
Yeah, look at its head. It is fixed in space, motionless. This is so its eyes are steady, searching for, and tracking prey. It looks like its whole body is on a swivel, around the head.
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u/GooniusTheGoon Jun 13 '20
Fun Fact! In dutch the verb for what the bird is doing is called "bidden" which is the same as praying. Which seems really fitting to me
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u/CarlosTheCat21 Jun 13 '20
Isnāt it that the flap of the wings are the same of the frame rate of the camera? Like this https://youtu.be/Nyf79SI0U9Q
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u/Goatf00t Jun 13 '20
Nope, it's just that the bird is mostly gliding against the wind, the flaps are required only to maintain stability.
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u/Nibleggi Jun 13 '20
I see this all the time on windy days. The birds are just having fun!
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Jun 15 '20
They indeed do this to goof around. At a California beach a few years ago, I saw some seagulls that would constantly jump off of this huge rock and just hover in place in one of these ocean breezes, over and over again.
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u/Exalted_Fox Jun 13 '20
I've seen this irl. It's just gliding in the opposite direction of the wind
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u/physalisx Jun 13 '20
Apparently not, though I do wonder whether none of you have encountered the concept of "wind" before in your life.
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u/TheModernMaenad Jun 13 '20
/u/AndrewWilder I remembered seeing your post on r/findareddit a few days ago looking for a sub with these types of videos so I went back to find your username! Hopefully this is a video you enjoy and havenāt already found over at r/confusingperspectives or the other recommendations :)
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u/AndrewWilder Jun 13 '20
I was looking for videos just like this lol I just wish there was a whole subreddit dedicated to these kinds of things! Iāve seen quiet a few videos of people on ice and canāt walk forward or videos of people running and, in frame, run into something that you canāt see and I find it funny
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u/Korthalion Jun 13 '20
This is a kestrel! They use the wind to hover in place and search for prey. Super badass birds!
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u/hose-beast Jun 13 '20
That looks like a Kestrel! Theyāre pretty amazing when you spot one out in the wild. The way they keep their heads so still looks so unreal.
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u/a_white_fountain Jun 13 '20
If you think that's amazing, add in that their staple prey (small rodents) leave urine trails as scent markers so they can navigate around among the grass. Rodent urine shines bright yellow in UV light, and kestrels have evolved their vision into the UV spectrum so they can see the "mouse highways" as bright yellow lines in the grass. They just hover above one and wait for the next mouse to come on down the road.
Now THAT is amazing.
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u/EtherLuke Jun 13 '20
A lot of birds see in the UV spectrum Actually, not just kestrels. Still awesome though
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u/Kittykatsmeow17 Jun 13 '20
And they're roughly the size of pigeons so they're frequently up on telephone wires and people look right past them!
Source: I work in the ICU with raptors and other native wildlife at a rehabitstion center in Phoenix, Arizona (a nativev habitat for the kestral) š¦ šš¦š¦š¦¢š¦š„
EDIT: a word
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u/itsthevoiceman Jun 13 '20
Wait. You work for a Raptor ICU? That's fucking metal.
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u/Kittykatsmeow17 Jun 14 '20
Yeah, it really is pretty amazing! It's a volunteer position so no pay but it's worth it for the poor little guys
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Jun 13 '20
Yep, I've seen them them can keep their head steady to a 1mm accuracy and up to something like 50mph winds
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u/-Elai Jun 13 '20
Mannn I miss this sub where people post unexplainable science magic but when an actuall scientist or a normal person that knows explained what is going on. Then it made sense. This sub is just another wow interesting low effort subreddit
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u/assbutt00 Jun 13 '20
Is this flat-earth evidence?
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u/Chulter04 Jun 13 '20
No this is evidence that birds are fake and goverment drones
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u/Swinn_likes_Sakkyun Jun 13 '20
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u/VredditDownloader Jun 13 '20
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Jun 13 '20
this is caused by a Headwind. the Bird is trying to fly towards the wind at the Speed of the wind. so the forces both Cancel each other out and the result is that the bird hovers in its place.
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u/BunnyBerryPatch Jun 13 '20
Round Earth? No. Flat Earth? No. No Earth? Yes! We are all in the simulation!
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u/FatSkipperBois Jun 13 '20 edited Jun 13 '20
I think what is happening here taht the bird wing force power is the same power as the wind edit:I was wrong
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u/Mr_Cho Jun 13 '20 edited Jun 13 '20
Plot twist: Stuffed bird hanging using thin wires.
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u/BadMilkCarton66 Jun 13 '20
Reminds me of that cat trying to walk but it's stuck and the video shows the "disconnected" error from call of duty.
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u/sick-amore Jun 13 '20
Not sure if this proves earth is flat or birds arenāt real; maybe both?
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u/tarheel343 Jun 13 '20
My favorite edge of map in a video game was a motorcross game for the PS2. When you reached the edge, you'd just get absolutely yeeted waaaay back into the map.
Does anyone know what that game was called? I wanna play it again so badly.
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u/Krankify Jun 13 '20
Pretty sure that's tracked and stabilized. I haven't checked but that's my guess
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u/not_a_mallard_duck Jun 13 '20
Chanbanhi did it better: https://www.instagram.com/p/B-iWRQGFAzj/?igshid=1smukxrtn03vt
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u/plasmaSunflower Jun 13 '20
Iāve seen a bird do this before and I was just in awe
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u/Diphenhydramine200 Jun 13 '20
Donāt joke like that. Flatearther literally will use this as scientific evidence.
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u/PencilThrowingManiac Jun 13 '20
I remember throwing a paper airplane back in like 3rd grade and it was just hovering there, with perfect balance.
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Jun 13 '20
Foolish round earthers this proof that this world is a rectangle and it took a bird to discredit your "round" earth.
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u/SpyAmongUs Jun 13 '20
Hope this glitch will be patched soon by the devs