The Insane Biology of: The Harpy Eagle

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Patreon: / realscience
Twitter: / stephaniesamma
Instagram: / stephaniesammann
Credits:
Narrator/Writer: Stephanie Sammann
Editor: Dylan Hennessy (www.behance.net/dylanhennessy1)
Illustrator/Animator: Kirtan Patel (kpatart.com/illustrations)
Animator: Mike Ridolfi (www.moboxgraphics.com/)
Sound: Graham Haerther (haerther.net)
Thumbnail: Simon Buckmaster ( / forgottentowel )
Producer: Brian McManus ( / realengineering )
Imagery courtesy of Getty Images
Harpy Eagle Skull" (skfb.ly/6VQv6) by Got_Pizza is licensed under Creative Commons Attribution (creativecommons.org/licenses/b...)
Music:
Run with the Wolves by Ardie Son
Decisions by ANBR
Secret-pathways by Ardie Son
Horizon by Veaceslav Draganov
Rain by ANBR
Visions by Ardie Son
Saved by Lemon J
References:
[1] animals.sandiegozoo.org/anima...
[2] www.sciencedirect.com/science...
[3] oxfordre.com/neuroscience/vie...
[4] www.opticianonline.net/featur...
[5] takethemoment.org/?p=152
[6] pubmed.ncbi.nlm.nih.gov/11076...
[7] journals.biologists.com/jeb/a...
[8] cpb.iphy.ac.cn/article/2020/20...
[9] www.fws.gov/lab/featheratlas/...
[10] courses.lumenlearning.com/os-...
[11] animals.sandiegozoo.org/anima...
[12] pubmed.ncbi.nlm.nih.gov/20727...
[13] royalsocietypublishing.org/do...
[14] link.springer.com/chapter/10....

[@-longboardswordstyle701]

Was at a zoo recently and a random duck flew and landed on top of a harpy eagle enclosure. The eagle flew up from underneath and, landing upside down on the roof of the cage, it reached with one of its claws and grabbed the duck through the chain link fencing. It then proceeded to furiously yank at the duck and *ripped it to shreds* pulling it through the few inches of space. I wont go into detail, but it was absolutely horrifying in many many ways..

[@Trebelsi]

My dad's friend was was looking at a seagull at work in the cafeteria, he goes to take a bite of food and hears "THUMPPP". ..... He looks over and and an eagle has its claws in the seagulls back and would fly 10 feet up, slam it into the ground and repeat till death. It then flew away and ate it on top of Cavendish farms.

[@DDAWGY1]

Did you get video of that?

[@jacquesjtheripper5922]

Cool 😁

[@KlaximumSkroeft]

That's dope as hell

[@snarl3027]

Liar

[@toastmctoasting2807]

The fact that humans need stab proof vest to survive one of these guys tells you how deadly they can be

[@kingpest13]

I'll kick their asses

[@BrandedWings]

Scary

[@ErdingerLi]

Well for one we truly are quite pathetic when it comes to physical attributes and abilities as compared to other animals. Most ungulates are capable of running as soon as they are born whereas the only thing our babies can do is whine like a bitch LOL. Our greatest weapon is our brain when we are fully developed that's all 😅

[@ultimatumdweebium2965]

@@ErdingerLi not really, we are able to use tools and can recover stamina while running, our ancestors hunted prey by running till the prey became so tired it just gave up, we are like the best long distance creature on the planet, excluding unfit people also we intimidate many animals because we are so tall we can learn to climb and swim we are by no means weak we have a lot of hax we just lack raw power

[@ultimatumdweebium2965]

@@ErdingerLi and we can throw stuff, humans in the past made wooden spears and threw them in group hunting to kill animals

[@Blaze6108]

I've heard the harpy eagle described as "about as strong as you can get while still being able to fly", which seems appropriate.

[@jackiworld]

Not exactly. Bigger birds went instinct a few century ago ( human influence) and some dinausores birds were more than a 500kg

[@humanbeeing4780]

@@jackiworldAll birds are dinosaurs, and no, none of the avian dinosaurs weighed anything even close to 500kg. Pterosaurs are not dinosaurs.

[@jackiworld]

@@humanbeeing4780 Quetzalcoatlus

[@CrysleyXavier]

I live in Brazil and by dozen times faced this beast at zoo very close. It's a huge animal and his looking inspires fear and enchantment at same time. Just amazing.

[@Dynamo001]

The male is small, the female is the big one.

[@dynhoyw]

@@Dynamo001fatherless

[@mrjoe332]

Could you imagine if a bunch of aliens dropped 2 super predators on a city just to see how the humans adapt to it?

[@yourmother5810]

I feel like that's a movie lol

[@enzolong9085]

Lol forreal, just to stroke their egos, the results of the publication dont do anything to progress our society but hey at least we learned something right?

[@mbartelsm]

@@enzolong9085 "Learning" is the progress.

[@Liboo52]

That’s exactly what I was thinking. I’m surprised those researched were able to get clearance to do that experiment. Invasive species is such a huge issue globally, and purposefully releasing 2 apex predators on a population of creatures explicitly because they are vulnerable to attack is such a brutal thing to do. But damn does it make for dramatic science. Movie needs to happen.

[@Harry-zh3lc]

Called predator

[@lovelandfrog5692]

I cannot get over how gorgeous this bird is. It’s just beautiful. Incredible animal.

[@byunniq9060]

The ones with the crowns are creepy af

[@matimus100]

Monkeys are not Primates

[@LilacSreya]

@@byunniq9060 Morbid beauty is a genre of its own.

[@YOURthornSIDE]

@@byunniq9060 all of them have it, they can move/raise/lower it. Like a cockatoo does.

[@KelGhu]

The downside of the great diurnal eyes of the eagle is: they are basically blind at night. They really can't see a thing. Eyes all have compromises.

[@Term-0]

when you talked about the size of their legs and talons, I realized just how massive these birds are.

[@thedoruk6324]

and There are still people that dare to say 'modern dinosaurs are boring' - just take a look at this absolute Unit!

[@wilberator9608]

the first intelligent comment

[@thedoruk6324]

@@wilberator9608 :)

[@nabhchandra_]

this is nothing compared to dinosaurs back in the day tbh

[@FirstDagger]

@@nabhchandra_ ; Only if you aren't into flying dinosaurs.

[@thedoruk6324]

@@nabhchandra_ we already had theropods after theropods ie the infamous terror birbs

[@amphicyon4359]

I wonder if the Harpy calls weren't only used to identify primates without a response but to actually wear down their awareness overtime by conditioning them to expect calls before seeing the eagle. We might see more of those mix-ups and mindgames if we observed them in areas where primates lived alongside eagles for more than a year.

[@dustinthewind3925]

Kinda what i was thinking. I do that every year with wild turkeys when they come by for a drink and a nibble, and end up staying to lay a clutch... I let em see and hear me, but i dont move to em.

[@jordanperron2101]

Well I say yes and no. But there are some baboons who normally, yell and scream and make a ruckus when they see a predator coming.. but near this water hole where a pride of lions go, the baboons have learned to stay quiet and let the lions take an ungulate hanging around, so they didn't hunt the monkeys. 🤷‍♂️ same same but different?

[@jamesostendorf1518]

Still not sure why they made an artificial ecosystem when there's already many instances where the harpys prey on primates naturally

[@arislopes1924]

I’ve heard them before in the Matagalpa countryside and their call sounds kinda of like a normal birch but large bird screeching but still very different from anything else. You often hear them more than you see them

[@BlazeloflGlory]

I love this theory. Cry wolf a couple times and see what happens. Next time 🥩

[@phdtobe]

The harpy eagle’s ability to maneuver in flight through the trees in the forest when pursuing prey has got to be some kind of animal super power.

[@user-xu8cx8rq1c]

Now how do you know¿

[@mcfcDJ51]

this is a serious SERIOUS creature

[@benservey9295]

"50 kg of pressure." The engineer inside me really felt that one.

[@1224chrisng]

50kg of force is somewhat acceptable, 50kg of pressure is straight up sacrilege. What's the area? a tennis court? a postage stamp?

[@marioaveiro1118]

This!

[@lordgarion514]

@@1224chrisng Well in this case I would assume it's the area of its foot, more or less. But really, all you need to know is it's well more than enough to drive them claws ALL the way in. 🤪😄

[@lowdopamine1619]

@@1224chrisng it’s claws probably

[@AdvaitChatterji]

@@1224chrisng it's the area of the foot.

[@SirHenryMaximo]

I'm from Brazil, and I heard ranchers telling stories such as about _that_ time their grandpa saw a harpy lifting a newborn calf duting his youth, or _that_ day a harpy snatched a hound in Goiás. Clearly exagerations, wild tales, but it shows the reverence, respect and even fear the Harpy commands on people. Also, the state police here where I'm from has _Harpia_ as a callsign their helicopters.

[@gnatdagnat]

Are you sure they're exaggerations? Lol. I know someone whose dog got dove by a hawk in suburban america.

[@oiltoast3723]

How big did he say the dog was?

[@SirHenryMaximo]

​@@gnatdagnat Can't be sure if they are. I just took the stories with a grain of salt. But I see that in theory those claims could've happened.

[@SirHenryMaximo]

@@oiltoast3723 He didn't. One might think about Brazilian Mastiffs, but its really common for ranchers to own mixed-breed medium sized dogs.

[@arislopes1924]

Unfortunately due to heavy deforestation harpy eagles aren’t as common as they used to be in Brazil unless you live near a large forest or protected area they are most common in the Amazon basin now but I’m sure they were everywhere by the time the Portuguese got here

[@drferry]

We saw a Harpy chick on its nest in eastern Venezuela several years ago, one that had been filmed by the BBC. The chick was as large as an adult, but mostly white and still impressive, 120 feet up in a ceiba tree. Caretakers lived nearby in a cabin and showed us the nest. As we were leaving, we heard a whistled cry, and one of the guys said "adulto!" We hurried back, and there was the female bringing some monkey part to the chick. She looked stared down at us with the fiercest glare I've ever seen from a bird. Gave me the willies!

[@pradap2298]

Death stare

[@bernardossilva2168]

Awesome! So jealous

[@Dynamo001]

The female is the one to fear. They have those massive claws and are bigger than the males.

[@denzellneblett-marson7363]

i train a small hawk and the strength hes capable of at his size is unreal i could only imagine what a Harpy could do 😵

[@edgyanole9705]

What species is it?

[@naturewatcher7596]

Would like one Harpy trained as a bodyguard and hunter for me. :)

[@denzellneblett-marson7363]

@@edgyanole9705 he is a harris hawk

[@bernardedwards8461]

I caught a drake mallard on a slip of 300 yards with a female sparrow hawk, and many partridges.

[@guycalledcookie]

the harpy i’ve met is like really chill. unless you make sudden movements. still, hes fuckin rad.

[@morgangreen2601]

I've been a fan of Harpy's for years now, but this video blew my mind. The amount of intelligence gathered by the eagles during the BCI experiment is huge. Birds are truly in the same conversation as mammals in terms of ingenuity.

[@GeoffryGifari]

just imagine if birds have hands and opposable thumb

[@chrisdonish]

@@GeoffryGifari yeah we call them dinosaurs, the previous rulers of the planet.

[@GeoffryGifari]

@@chrisdonish dinosaurs with opposable thumb? now that's terrifying

[@haroonmohammed6351]

This level of intellect can be seen in tigers as well. Tigers are even known to imitate prey noises. My theory is this. If you are a heavy predator lacking in speed and a group but is solely reliant on living, agile prey for diet, you adapt by being more intelligent. In the documentary about harpy eagles, a strange thing the researchers noticed was that the harpy eagle chick they were studying, almost a year old wasn't shying away when these guys came to its vicinity. It was watching them intently, studying them. Knowledge and Being accustomed to the patterns matters when you are a heavy meat eater.

[@GeoffryGifari]

@@haroonmohammed6351 maybe the meat diet allows nutritionally expensive brain to be sustained (might also explain why harpy eagles can be so heavy?)

[@Ebola-Kun]

At some point around 1:17 - 1:20 seconds, the Harpy looks almost identical to some renders of dinosaurs I’ve seen. Different feathering but wow amazing history of life on this planet.

[@skytramp0291]

In our beautiful Guyana , there’s plenty here . Around our airport last year a young one surfaced , it was a magnificent sight .It was so majestic. But you can catch the sight of them around the racing tracks & trails .The sight of this absolutely stunning & smart creature isn’t no foreign sight almost EVERY DAY when you’re around the rural parts of Guyana you can manage to see one or maybe even two . I’m glad that our people have learned to honor & cherish the rare wildlife we’ve within our country . 🇬🇾

[@marvinpercival4717]

I like to go on a hunting expedition in guyana .would love to have a few jajuar skin it so beautiful.i heard guyana is like the amazone plus native people live in the jungle.

[@skytramp0291]

@@marvinpercival4717 fortunately you CANNOT hunt wild animals generally here anymore. There’s been a VERY STRICT bill passed by Guyana’s Wild Life Protection Services.

[@marvinpercival4717]

@@skytramp0291 hmm..im also looking to acquire about 3 hundred acres of gold land.would like to get into protroleum business 2.guyana have great oppertunity for investors to make a killing.

[@mediocreman6323]

Why do I get that feeling, that, when you see these eagles, they are actually checking _you_ out if you are potential prey? 😉

[@sewerrat11000]

@@marvinpercival4717 I hope you stay poor and have 0 money to travel or invest. You sound like a major piece of ****.

[@bonefetcherbrimley7740]

Harpy Eagles are truly majestic, I hope they're around for many years to come! So bad ass.

[@naturewatcher7596]

I'm glad it's not around in my area though. Hawks and bald eagles are enough for me.

[@sujalchopra.]

I honestly am in love with your 'insane biology' series. Your KZbin channel is the only one that provides a mix of behavioural and anatomical biology. There is a borderline between when information becomes boring, and you never seem to cross it. Can't wait to see your next video

[@realscience]

Glad you like them! :) :)

[@mostlyokay]

Maybe you know it already, but the channel Deep Look also presents a mix of behavioural and anatomical biology. Different style of video, sure, but you get it

[@steveapel2961]

@@realscience Hi, you should change your name to " sensationalized melodramatic misrepresented b.s. science propaganda" channel. To grossly misrepresent one of the most majestic raptors in the world as some kind of otherworldly, evil " death from the sky" being just shows your true intentions of not providing UNBIASED information, but a lopsided false view to true information. You left out many facts , such as how endangered these eagles are due to humans developing land. Raptors were once mindlessly slaughtered in the United States , from propaganda such as yours. Then at the end of the article, you babble on trying to sell some silly food service, and complain about how tough your life is deciding what to eat for dinner. Sounds a bit narrcistic. Have you ever eaten meat? Did you know that animal had to be killed so YOU could eat it? I'm sure this video made you a zillion dollars, but after all it was made by a self serving greedy human! Cheers!!!!!!!

[@privatewars5039]

@@realscience #Trump will be staged assasinated on 8/4/22 AND the space needle will fall in June 11th and 14th THIS YEAR⚠️⚠️❗❗❗a fake depiction of ELVIS will appear when it happens ❗❗DO NOT FALL FOR IT--JESUS CHRIST IS LORD ❗❗ IT WILL ALL BE STAGED BY SATAN AND THE ILLUMINATI

[@goatyqt4553]

I’d advice checking Moth Light Media too, it’s another great channel like this one!

[@igorschimidt1985]

The level of the explanation in this video is off the charts, well done!

[@igorsvacic217]

The probing call of the harpies left me jaw dropped. Had NO CLUE they are so intelligent.

[@maxcaulfield3562]

One of the most beautiful animals in the world! Love so much Harpy eagle! 🦅

[@naturewatcher7596]

I prefer ducks - harmless, fun to watch and delicious. :) The beauty of Harpy is deadly.

[@Sikeosomanic]

You have the best science channel on the web, hands down. It easily rivals anything I’ve seen on television. I am so damn impressed with every video I’ve seen from your team, and you deserve many millions of subscribers. Thank you for a consistently incredible and enriching source of entertainment and education!

[@realscience]

thank you! It means a lot

[@trigonometrymagician7996]

@@realscience Perfectly true.

[@rodrigoborges3876]

seconded! the quality from this channel is insane

[@jennytalia6724]

really because I find her voice to be nails on a chalkboard and the privileged researchers who get to study eagles for a living to be pompous, pretentious "scientists" who are in it for the pleasure without a purpose

[@Sikeosomanic]

@@jennytalia6724 Speaking of “without a purpose” 🙄…I don’t know what your problem is with those that study eagles, or any scientist conducting research for the sake of science, whether it meets your expectation for purpose versus personal pleasure or not…but I do know I’d rather enjoy the privilege of listening to her read the back of a cereal box, than have the unfortunate experience of reading more of your senseless and unnecessarily rude commentary again. I watched this video for pleasure, without purpose. I quite enjoyed it and was thoroughly impressed, so much so that I also shared it with a friend. He and I are privileged to both know more about Harpy eagles now than before, and are grateful for both the education and enjoyment. That was the purpose. Before chastising the channel for being “pompous” or “pretentious”, I think you ought to re-evaluate your own conduct and initiative.

[@amphicyon4359]

That's really interesting that the Harpys almost instantly began using calls to conserve energy when hunting, even though (assumedly) that wouldn't be their normal strategy in areas where primates lived with them for any length of time. Why could observational studies not be done elsewhere though, to get a glimpse at more developed behaviours? Was it just lack of funding or was their a special benefit of the island beyond a lack of predators?

[@lordgarion514]

The harpies used to live there a long time ago. I have no idea how long though. and they were wanting to see what would happen if they reintroduced them.

[@privatewars5039]

#Trump will be staged assasinated on 8/4/22 AND the space needle will fall in June 11th and 14th THIS YEAR⚠️⚠️❗❗❗a fake depiction of ELVIS will appear when it happens ❗❗DO NOT FALL FOR IT--JESUS CHRIST IS LORD ❗❗ IT WILL ALL BE STAGED BY SATAN AND THE ILLUMINATI

[@bernardedwards8461]

Hawks that call when they are hungry are usually very young. As a falconer, I find that by their second year they grow out of it if they have been flown successfully and become self reliant.

[@trevorjohnson8653]

@@bernardedwards8461 Wow. 2 completely different concepts. You are talking about hard wiring to ask a parent for food vs hunting strategy. Pretty obvious difference. If they are used in Falconry, they aren't self reliant. You need to work on your comprehension and logical thinking skills.

[@bernardedwards8461]

@@trevorjohnson8653 So do you. Small hawks do not depend on their parents in their second year, they drift away so as not to over exploit their home range. It's the same with trained Sparow Hawks, it is considered a great feat to fly the same hawk successfully for two or more consecutive seasons. I flew one successfully for six consecutive seasons, and have never heard of another similar case. The hawk was not fist-bound but was flown very successfully. You must be woke, because it is typical of wokemen to pretend to be knowledgeable about things they know noting about. The dumbed down exams they have passed convince them that they have exceptional intelligence, but they have been tricked! Are you an expert on military matters as well?

[@elijahmonkau2268]

The amount of attention to detail is just amazing, good job!

[@detlefgerundung4412]

I watch many videos about flight and stuff, but almost no one ever said something about the purpose of different feathers on a wing. Love you for this detail!

[@lawrencegrant8235]

Great documentary. The images are beautiful. In South Africa we have a very similar eagle, the crowned eagle. They have learned that in urban areas small pets are far easier pickings than monkeys.

[@nickybabyllc]

thank you so much for this video. i had so much fun watching and learning about these incredible animals! the info about the arms race between bats and moths was also such a treat!

[@samlee1666]

I'm in love with this channel keep it up. The narrator is so engaged and the information is really cool. This helps scratch the itch to learn about everything i can!

[@TrajanaFortis]

Awesome video! Wow, really wow. Diving immediately into the core essence of the Harpy with concise & brutally beautiful information. Not one moment wasted in nonsense. The narrator's voice & the music dance perfectly with the images. A very big bear hug to those who put this together.

[@Schnabeltassentier]

This in-depth video on one species is extremely fascinating!

[@CountCocofang]

High quality, information dense content with amazing presentation as always.

[@nafyah_media]

As a photographer I find that ability of determination of resolution is absolutely fascinating!

[@Sekir0012]

The communication strategy segment was legendary and the outro hello fresh plug was the most smoothest advertisement ever inserted in any youtube vid. Incredible documentary altogether.

[@medarenkyte5990]

This is so awesome! I would have never known such awesome birds existed if it weren't for this video. Thank youu! ❤

[@njihia]

Great video! The title, thumbnail, and the intro was so well executed. That intro!!

[@kaisersozay2217]

I had no idea how brilliantly adapted this beautiful destroyer was

[@louislin199]

Great video!! but i also like to add that this has one of the funniest ad segment that i even came across and i dont even know why, may be it is the calmness in the voice lol

[@pwolfamv]

Just egg... Serious note: incredibly fascinating look at the Harpy Eagle. Great video, thank you.

[@windubitably]

Had to wait for the ad at the end before I understood (and laughed) at this comment.

[@toxicstarcandy]

Loved that part

[@zappedguy1327]

Another fantastic vid.Your content is precise and clear.

[@PotatoMC1]

I _really_ love these videos! I've rewatched most of them at least twice

[@scootabean]

I just discovered them and NOW IM OBSESSED

[@gatopan2558]

love your channel, can you do the mantis shrimp next time?, is an insane animal

[@Torpeddo]

The Bruce Lee of the ocean. Would be interesting

[@realscience]

its on the list :)

[@tahiraamari2483]

@@realscience yes yes yess, i cant wait to hear about the physics of their punch, i hate physics but you put it in such a digestible form i become interested

[@benmcreynolds8581]

I would love to know what it looked like to see the Haast's Eagle attacking the giant Moia birds in ancient New Zealand

[@ZoltanZaka]

They have a peripheral vision of course too, so they perfectly see what's in front of them. They can fly straight while striking down, they only maneuver to stay out of the sight of the prey but their head and eyes stays focused on the prey all the time once engaged.

[@teakanji9864]

This is the coolest channel I’ve come across in a while. Great content!

[@webbess1]

I saw them at a bird park near the Iguazu Falls in Brazil. They're absolutely enormous.

[@Brownyman]

A video about the “hawk/goose effect” would be amazing!

[@rd94610]

The design of this bird is amazing. Excellent video.

[@mofasselhossain1618]

All of your videos are outstanding. Maximum dose of information.

[@Deeplycloseted435]

This is the most intimidating looking creature I could imagine that actually exists.

[@ninjamoves3642]

What a awesome raptor. In Australia we have Wedge Tail Eagle & Powerful Owl, two equally impressive birds.

[@geoffreyhhill]

This channel is the BEST science channel. I’ve learned so much watching these videos

[@cwr8618]

what a STRANGE way to gain funding. Solid video. Love the science behind their physiology

[@SnoopyDoofie]

6:47 The Golden Ratio. Interesting.

[@arcanyxia6825]

Yeah, I was thinking exactly this

[@iwasadeum]

Just got back from Alaska the other day. The Bald Eagle was a common sight. My river fishing guide showed me a video of a large eagle harvesting an adult king salmon from the river a few weeks earlier. Seeing an eagle take an adult salmon from the river (easily 10+ lbs) definitely gave me new found wisdom in the power of an adult eagle. Harpy eagles are 10-20%+ heavier than the Bald Eagle. I can't imagine its strength.

[@Glen.Danielsen]

What a beautiful eagle type! And the great videography enhances the awesomeness of it. The slow motion give view of its stunning broad airfoils.

[@nathanaelmoh5848]

The narrator has one of the most pleasant voices I've ever heard. Love the video btw. First video I'm seeing from your channel and I have subscribed already.

[@rafatowers]

Absolutly amazing

[@thelonefedora]

Wasn’t expecting a video on these Chads, but I’m always pleased to be surprised by each video you make, keep it up!

[@lalocruz2314]

I love this channel can't wait for the next one!!

[@boriboribo]

Your voice is to my ears, like the feeling when you have an itch, and you keep scratching it and you can't stop cause of how good it feels...just soo addicting. 😌

[@El.Duder-ino]

It's truly astonishing what mother nature with evolution have created, incredible! Thank u for another very educative episode👏👍

[@Alls10]

Happy eagles are awesome

[@Alls10]

Harpy eagles are cool too I guess

[@Indigoharpy]

Yes

[@josephdouglas6482]

Really nice video, very interesting stuff. The experiment on the island was so cool to hear about.

[@LosJoshh]

Amazing vid!! Love your deep dives into these animals I’ve been wondering this for awhile now and Im curious if you have answers to this. What’s the biology behind the narwhal, and I mean what we all wonder, the horn it has. I’m curious how evolution kept the extended tusk, I’ve done a bit of googled of how the tusk helps the narwhal but i’d love to see you dive more in depth about this unique creature.

[@mskimyu]

Always a fan of this magnificent eagle. Can you also make one for the Philippine Eagle? Thanks!

[@abhinavsharma3304]

also harpy eagles stores the bones of their prey in their nests and most harpy eagles are friendly towards humans which makes them a easy target for hunters.

[@roddo1955]

The harpy was just angry because it noticed it was being filmed from its 'bad side'.

[@yoogeo1]

Oi that segue into promoting your sponsor was actually world class. Most organic promotion of a sponsor I have ever seen. Great video, but I was so impressed by that last bit

[@TeddyAlkavari]

OMG THANK YOU!!! Finally Some Depth About Birds, Especially The Harpy!

[@ivanapostolov7674]

You are producing some really great content. Greetings from Bulgaria!

[@princeranjan3439]

from bihar

[@arislopes1924]

Harpy eagles are still pretty common in eastern Nicaragua and much of Costa Rica. I’ve seen them before perching in large ceiba trees by riverbanks you don’t realize how big they are until you see one in person and their talons are huge like the size of large hands

[@dcagepcutta6488]

Ya don’t got cell phones over there? Where the footage?

[@ntyler2344]

Love Harpy Eagles! Thank you, this was incredibly informative.

[@christopherweston6028]

thorough. thank you for your work

[@oumuamua5648]

Ótima idéia, seria maravilhoso ter um robot cozinheiro!

[@ThereWhereWeAreNot]

The level of information about the harpies and evolution in this video is insane though 59 kg of pressure really leaves me with the feeling it’s 1% away from being ideal. Thanks a lot

[@badger297]

This channel is incredible. Well done 👏

[@joshstewart6411]

Amazing video, and that was the smoothest transition into a sponsor-ad i've soon.

[@t.farias9336]

harpy eagle >>>>> bald eagle

[@twisted_coconut4093]

I got killed in Stormveil Castle by one of these

[@erikcarrillo7378]

Fuck those things

[@z.s3072]

I saw one of these at the San Diego zoo, it was a beast. I think of him often, mostly because he told me he would hunt down my firstborn...apparently, he didn't like me staring at his feather crown thing.

[@timsexton]

This video was of such quality, I replayed it at 1.0x after my initial 1.5x troll. Love the details surrounding Harpy visual acuity & staggered fovea. Another obscure tactic or strategy is that as Harpy young are raised, the quarry inside the nest kill zone are intentionally preserved & avoided. As the young matures into adulthood, the prey within the nest kill zone becomes the practice quarry. Pretty clever, eh? *_TRUST !!_*

[@Epochal_Enigmas]

"In one incident, a harpy eagle even nearly knocked a BBC cameraman unconscious, and could have killed him if it wasn't for the fact that he was the cameraman."

[@smokymtpotpourri4760]

I discovered these creatures a few years ago & I was totally freaked out by them!! That feeling has only intensified after watching this! 🥺 Added: Google photos / images of these things. Their (frontal) faces are much too human-like NOT to be creepy as hell! ...not to even *mention their insane - & quite disturbing - intelligence!!

[@BLove0]

Great video! very well put together.

[@renatab8293]

Some beautiful footage here. And great science.

[@RahulAhire]

Hey Stephanie, can you please cover Cassowary next time since they are the living generation of T-Rex.

[@iwatchwithnoads7480]

I want to know why the cameraman was wearing stab proof Kevlar vest while climbing a tree in the first place

[@vecbenoit2856]

I'm obsessed, thank you

[@artvandelay8085]

EXTRAORDINARY VIDEO! very educational and informative!

[@dylanburroughs4841]

Firstly, WONDERFUL video. Extremely informative and well put together. Random tangent question, though. At 4:52, when she's talking about the eye, what music is playing in the background? I am in love with it, and need to know where to find that haunting tune.

[@cindyrhodes]

That is one formidable bird. The way the feathers are on the face, it makes the neck look really long when it takes off. I'd hate to be hit by this thing!!! ❤️ 💙 💜

[@lordgarion514]

You wouldn't want to be grabbed by it either. 🤪🤪🤪

[@CrispyClouds]

I love raptors and that was amazingly detailed. Thanks!

[@marcellocampbell3751]

Love this video it was learning program for me and was very detailed I enjoyed it 👍keep making more 😁😌

[@upset_banana]

6:50 The Golden Ratio expressed through flight passed on through learned behavior / genetics.

[@curtismann6851]

It’s a testament to evolution and time…they have evolved to use the absolute most efficient path,,,which the golden ration represents…and why it shows up in many natural phenomena

[@ziyadashraf599]

actually it's not quite the golden ratio. the video said that the eagle's highest accuity vision occurs at about 45 degrees to the head axis, which means that the pitch of the spiral path it follows is about 45 degrees. The golden spiral's pitch is approximately 17 degrees. Therefore, the eagle's path is more closely tied to some other metallic ratio, which generates a different member of the logarithmic spiral family.

[@GA3S_]

​@ziyadashraf599 but even then at 45 Degrees is the 9 code which still fits in the golden ratio. Spooky stuff

[@CerebrumMortum]

This "communication arms race" sounds human-level military strategies. "Intelligence Warfare" and deliberate deception. That's amazing. PS, the production value of your vids is ASTOUNDING.

[@alexanderthegreat6682]

It makes sense though. In the end, isn't that what evolution boils down? An arms race of the survival of the fittest

[@jmcdonald6063]

Gotta make some more bird videos. They are so good

[@Soledoubt]

Ay yo I don't know who the narrator or research team is but this real science channel is boss. Clear, concise, well research and entertaining in delivery