These Extinct Birds Really Stretch the Definition of “Bird”

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This episode is brought to you by the Music for Scientists album! Stream the album on major music services here: streamlink.to/music-for-scien.... Check out “The Idea” music video here: • The Idea, written by P... .
From birds with no wings to giant fowl that were once mistaken for predators, here are 6 birds that who's strange features may not be what you think of when you think of birds!
Hosted by: Stefan Chin
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www.ncbi.nlm.nih.gov/pmc/arti...
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Image Sources:
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commons.wikimedia.org/wiki/Fi...
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commons.wikimedia.org/wiki/Fi...
commons.wikimedia.org/wiki/Fi...
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commons.wikimedia.org/wiki/Fi...
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Опубликовано:

27 май 2024

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Комментарии : 643

@SciShow 3 года назад

This episode is brought to you by the Music for Scientists album! Stream the album on major music services here: streamlink.to/music-for-scientists. Check out “The Idea” music video here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-tUyT94aGmbc.html.

@jasonbrokas5700 3 года назад

@anuragguptamr.i.i.t.2329 3 года назад

Are phytoplanktons and zooplanktons closely related to each-other, as per their family trees? Make a video on this topic.

@PixieStixx 3 года назад

The largest flying bird is an Albatros? What about Condors?

@georgeb.wolffsohn30 3 года назад

How about music BY scientists ?

@owatonnahacker 3 года назад

The way to tell if they are early birds or dinosaurs is whether they got the worm... The early bird gets the worm.

@monkestronk1227 3 года назад

Enough jokes dad

@lancethrustworthy 3 года назад

You are under remote arrest for verbal abuse. ;)

@katyungodly 3 года назад

Are you my stepdad?

@NajwaLaylah 3 года назад

@@katyungodly That's up to your mama.

@FrikInCasualMode 3 года назад

Early bird gets the worm, but late mouse gets the cheese :)

@jaschabull2365 3 года назад

Quetzalcoatlus: lol, u so smol. Bird: Damn these drumsticks.

@Samael1113 3 года назад

Unless you are referring to the feathered serpent god of Central & South American tribals, I believe you are missing an "-us" at the end of that.

@jaschabull2365 3 года назад

@@Samael1113 *facepalm* You're right. Fixed.

@archive2500 3 года назад

Bird: You are a bird-wannabe. Quetzalcoatlus: I came first, you idiot.

@MrFleem 3 года назад

To avoid confusion, just call every feathered beastie a dinosaur.

@archosaur7775 3 года назад

And yet, there are feathered pterosaurs. In fact, crocodilians even have a gene in their embryonic stage coding for feather growth.

@nihilanthropus 3 года назад

@@archosaur7775 actually there are plenty of extinct Pseudosuchids(maternal clade of all crocodilians) that were most likely feathered as well. So, no, not all of the feathered beasts are dinos.

@zackdewey6474 3 года назад

Basically my pet chickens

@Hailfire08 3 года назад

Better still, call all tetrapods fish

@sivadasannarayanan1328 3 года назад

Plumed rhinos?

@Master_Therion 3 года назад

I was once part of an expedition to the island of Mauritius. There were reports that the extinct dodo bird had been spotted. We kept finding evidence of a large bird, but in the end it turned out to just be a wild goose chase.

@massimookissed1023 3 года назад

D'oh d'oh

@sapphirII 3 года назад

Nice to have seen you again!

@rickseiden1 3 года назад

"Stop, Dad. Just stop." :)

@remuladgryta 3 года назад

Just imagine all the worms these early birds would've caught.

@MarkWTK 3 года назад

the pun master is back

@hairytick7882 3 года назад

"Gastornis has such an unusual skull, that for a long time paleontologists weren't sure what they ate." Sitting on the toilet at 5 am watching this video, I honestly thought he meant paleontologists ate one and were confused about what kind of bird they had just eaten... then I realized how silly that sounded.

@ivankurta1033 3 года назад

same

@neoqwerty 3 года назад

To be fair, that's basically human history in a nutshell: "Don't know what this is exactly, but I'll try it, it could be tasty."

@davidozab2753 3 года назад

From now on I will refer to birds as 'non-opposite birds,' just to see how people react.

@YeeSoest 3 года назад

Please report!

@God-Emperor_Elizabeth_the_2nd 3 года назад

Opposite-opposite birds

@minoadlawan4583 3 года назад

Call you a dork

@RowdyBoy82 3 года назад

I'm irritated about it.

@shanerooney7288 3 года назад

The non-opposite avian dinosaurs of the Cenozoic era.

@JalenJaguar 3 года назад

To assess if a “bird” is “early” ...one must simply ask whether it got the worm 🪱 or not

@davidweihe6052 3 года назад

Once, birds are larger things than worms, but they all died when God hit the queue ball into the Eight Ball in an inter-dimensional game of pool. At least according to Douglas Adams.

@ylstorage7085 3 года назад

"our ancestors had emerged from the sea and conquered the land. Today, I have invented flight!" "... nah ... let's go back to the water and do submarine mode"

@danielawesome36 3 года назад

"It seems a little odd now, but flightless mega-birds have been a winning strategy for tens of millions of years." Yeah, it seems like Australia can witness to that.

@petergray2712 3 года назад

Flying requires so much energy, and so much food to provide that energy, that in the absence of large mammal predators birds frequently return to flightless phylogeny. Australia's microclimates tended to discourage large mammal predators, and natural selection was biased towards larger, faster and fiercer birds too big or fast for smaller predators to overpower.

@ogorangeduck 3 года назад

Aside from the war which I won't mention for our Aussie friends' sake, cassowaries are also proof of birds' descendance from dinosaurs

@danielawesome36 3 года назад

@@ogorangeduck *t-rex noises*

@Dragrath1 3 года назад

@Mullerornis Technically large bids quickly filled in the vacant niches after the K-Pg extinction with large flightless birds evolving on all continents the majority of these birds were members of the Paleognathes an ancient lineage of ground nesting birds that split off from other birds in the Early Cretaceous. In birds at least compared to surviving mammals larger body size is actually to some degree an ancestral condition that they were preadapted for as birds are a lineage of dinosaurs after all. Mammals wouldn't get really big until the latter half of the Cenozoic a possibility largely opened up as lower temperatures favor larger body sizes also it might be a contributing factor that the large predatory crocodyliforms that dominated the apex predator roles in the early Cenozoic were increasingly restricted in range by dropping temperatures.

@Dragrath1 3 года назад

@Mullerornis well yes of course there are exceptions and things are quite complicated in terms of the details but we are talking statistical averages there were lots of lineages evolving new adaptations in the post extinction environment.

@madLphnt 3 года назад

Just imagine the fossils we haven't found yet.

@rickkwitkoski1976 3 года назад

EXACTLY!

@Boogaboioringale 3 года назад

Or the ones we will never find.

@madLphnt 3 года назад

@@Boogaboioringale yeah, or the ones that have disintigrated.

@Boogaboioringale 3 года назад

Miller Riddell : perseverance is in the very best spot. A crater(Jezero) in a river delta and the crater became a lake. Plenty of juicy stuff there for sure.

@brianjensen5661 3 года назад

Fossilized tanks!

@pr0v3n 3 года назад

As someone with 1600+ hours in ARK, this episode was incredible to see so many dinosaurs I knew about! Thanks Sci-Show!

@badsmilesorrisocattivo 3 года назад

I drop ARK less than one hour gameplay :/

@chan-bch.6833 3 года назад

As an ARK player seeing both hesperonis and pelagornis in one video fills my heart

@KSWfarms 3 года назад

Same!

@AaronSaysSKOL 3 года назад

Don't forget about the Archy. Lol

@chan-bch.6833 3 года назад

@@AaronSaysSKOL I think we can all try and forget the microraptor

@AaronSaysSKOL 3 года назад

@@chan-bch.6833 They're 2 different creatures, actually. Archy's are the ones that help you glide when you carry them. Mictoraptors are the assholes who ruin a good scouting trip.

@deinonychus1948 3 года назад

@@AaronSaysSKOL and Hesperornis (and/or Ichthyornis) is the jackass that steals the meat/narcotics (I think they can steal narcos... may be wrong) that you were about to force feed to a Spinosaurus and now you have to run to base to get more... only to find that Spino awake and is now chasing you back to base and I'll stop there lol what were we talking about?! Oh yeah; f**k the ARK seagulls!!

@kalanivernon7273 3 года назад

Then you have the Hoatzins, which are the only extant modern bird that still retains functional clawed wings (at least as juveniles). They lose these features in adulthood however.

@DasDuken 3 года назад

At least some ratites retain tiny claws in the adult form. Ostriches do.

@carlosandleon 3 года назад

Ostriches have them too

@caviramus0993 3 года назад

@@DasDuken emus too

@kalanivernon7273 3 года назад

I missed a word. I meant to say functional claws. Fixing

@gamehunter2407 Год назад

@@kalanivernon7273 Turacos are said to have them too although I haven't found any images

@mal9369 3 года назад

Imagine if birds still had grasping hands on the ends of their wings

@teabean1348 3 года назад

*Every Australian who has angered a magpie*

@justsomehaatonpassingby4488 3 года назад

Hoatzin: Am I a joke to you? Jokes aside, only Hoatzin chicks still have the claws in its arms present,..

@pepesylvia848 3 года назад

A lot of birds still have a claw on their wing for climbing.

@pepesylvia848 3 года назад

@@justsomehaatonpassingby4488 So do chickens

@sampagano205 3 года назад

Crows would be even better at tool use probably.

@WildFyreful 3 года назад

It's so cool that many of the names here made sense after watching the PBS Eons video "when birds had teeth" :D

@AstraeaAchelois 3 года назад

Lol yeah

@xxxbbb7601 3 года назад

Our birds, in all their diversity, are only the re-grown branches off of a once much larger tree of life

@MajinObama 3 года назад

Exactly. Every species only has 1 common ancestor.

@ancientswordrage 3 года назад

You had me at "Four-winged Microraptor"

@Dragrath1 3 года назад

Yeah microraptor is fascinating though it should be noted that microraptor and its kin were around for such a long time period so there probably wasn't just one microraptor. Interestingly evidence has built up that within the microraptor lineage of dromaeosaurs true powered flight independently arose so while many species of microraptor were just gliding animals by the later half of the Cretaceous they too had evolved powered flight based on the skeletal morphology indicating powerful muscles capable of supporting powered flight and gut contents that are hard to reconcile with a gliding life style such as fish and birds in environments that didn't support the large trees or cliffs gliders would need to glide. There is even more recent work showing that within Paravians powered flight may have evolved convergently as many as 4 times possibly more. www.biorxiv.org/content/10.1101/2020.04.17.046169v1.full And yes microraptors were dromaeosaurs so this means there were flying dromaeosaurs though they were only about the size of a crow with a diet consisting of small vertebrates fish, lizards & birds based on fossil got contents so I wouldn't be surprised if mammals were also on their menu. ;)

@ufosrus 3 года назад

@@Dragrath1 Geezzuss! Are you a student of Paleontology or just obsessed with it?

@pointystuff 3 года назад

Can you do the evolution of swine? A friend and I hit a dead end when looking them up and I really hate that lol. I want to know the in-between ancestors.

@annaclarafenyo8185 Год назад

Look up whale and hippo, close relatives.

@pointystuff Год назад

@@annaclarafenyo8185 yeah 😊Oh seals and bears are related distantly

@The_CGA 3 года назад

That was...pretty good, scishow. Possibly one of the most information-dense videos I’ve watched in quite a while

@mam162 3 года назад

Ostriches and penguins really stretch the definition of "bird" as well. It's not just the extinct varieties.

@brianroberts783 3 года назад

Kiwi birds, too. They're sometimes referred to as an "honorary mammal."

@janmelantu7490 3 года назад

Anyone who thinks Feathered Dinosaurs aren’t terrifying have never seen an ostrich

@spitfirebird 4 месяца назад

@@janmelantu7490 or an eagle.

@Pika250 3 года назад

This is exactly what Archeops did to Pokémon. The line are not called "first bird Pokémon" for nothing, especially since the fossil that revives into Archen is called the plume fossil, referring to the feathers.

@KraigFang 3 года назад

Yay keep rocking the science! Thank you very much 🤣😂🤣😂 Really I just like this channel so much ☺️😉😁

@punditgi 3 года назад

Yes, totally awesome videos with a very easy presenter to listen to.

@1984potionlover 3 года назад

That's the most plucked archaeopteryx I've ever seen in an illustration..no wonder he looks a bit pissed, or maybe he's just dancing, trying to stay warm...you know, because of the whole "plucking" situation. Cheers :)

@time6996 3 года назад

Regarding the thing about the big legs: Some birds like swifts for example don't rely on their legs as much like other birds. To my knowledge, swifts can't take of from the ground and rather jump of some elevated place. Could even bigger birds evolve if they had a similar lifestyle?

@davetoms1 3 года назад

Stefan's not just one of my favourite SciShow hosts. Stefan's one of my favourite educational content hosts on RU-vid.

@Lord.Kiltridge 3 года назад

It has come to my attention the Bird is the Word.

@brycevining4500 Год назад

I am yet again in awe of the beauty and diversity of life on Earth. I really wish we could interact with some of these bizarre ancient birds.

@Painted_Owl 3 года назад

I usually have that, “wow, has it really been 10 minutes already?” feel from these videos, but this one definitely takes the cake. So much crazy cool stuff, it honestly felt like 5- 6 minutes- tops

@desk-kun 3 года назад

I still need to know more about beaks

@pepesylvia848 3 года назад

Beaks are cheaper to produce than teeth. That's why they exist. They're a little lighter than teeth, which may be why they're favored by birds.. since flying is very hard, and anything unnecessary and heavy can be prone to being lost.

@pepesylvia848 3 года назад

@Wattle Yes, I wonder how many reptiles use gizzards. Probably not as many. Because the weight of teeth may be easily replaced by swallowed stones, I suspect the costly nature of producing teeth may be the more likely origin of beaks. Especially since we see it in turtles who mass spawn, and even most mammals are born without teeth, and we usually have to put a lot of work into rearing young. Beak gets you into the game fast.

@tian320i 3 года назад

This was a enlightening episode. Thank you!

@petitio_principii 3 года назад

It's very intriguing why only neornithine birds have survived the K-T extinctions, and no enantiornithe at all. More intriguing than even why crocs still are around. It makes it seem like the non-croc and non-neornithe intermediates were all in some sort of disadvantage (or sets of disadvantages) for the extinction scenario.

@jaycalli40 3 года назад

I’ve said it before but it’s uncanny how similar all the different hosts sound on this show. Good episode

@peter4210 3 года назад

Chicken embryo grow teeth but in the late stage of development the teeth get covered by the beak. The chemical makeup of feathers is also close to scales and they found the gene responsible for it. We could easily manipulate bird dna to have teeth and scales

@caviramus0993 3 года назад

There was a study making proto-feathers in alligator embryos.

@shanerooney7288 3 года назад

I like this video format. Giving a brief overview of an entire evolutionary tree.

@___i3ambi126 3 года назад

I find it funny noticing that every major animal group (maybe being a little too vague) has had a time where it defined the period. And the versions that stuck around were often not why they originally evolved nor the most common type. I feel non-human mammals might be most likely to live on in the water. Whales and dolphins are extremely good at being underwater predators. Breaking records for the largest ever.

@kyrab7914 Год назад

And then they get too specialized and an extinction event happens and most or all of them die and a new age begins. And a new lifeform starts radiating and specializing in different niches and boom new apex predator. Makes me wonder about humans tbh. We're the only branch left on our tree. We've triggered mass extinctions. What next?

@HeatherSpoonheim 3 года назад

Ba ba ba bird bird bird - bird is the word.

@biggusdickusiv5883 3 года назад

No, go sit in a corner

@Freddie_Dunning-Kruger_Jr. 3 года назад

I can't get the Ann Margret song out of my head, damn Mad Men

@Ayelmar 3 года назад

At 9:40 -- So ancient birds were also prey to the Tyranny of the Rocket Equation? ;)

@LuinTathren 3 года назад

Nice.

@Archgeek0 3 года назад

I was about to post just about exactly that comment. Bigger wings need bigger legs need bigger wings... probably goes by the natural log... yup, rocket equation for modern dinosaurs.

@Dragrath1 3 года назад

@@Archgeek0 Yeah it really is a good comparison though not quite exact but I hadn't thought of it in this terms. The main difference here is that the muscles are basically acting as the rocket fuel in this analogy releasing stored potential energy. In summary bipedalism and flight don't mix very well if large sizes are your objective both pterosaurs and bats are quadrupedal which means they have less difficulty getting off the ground for bigger sizes though bats due to being mammals lack the hollow bones and more efficient respiratory system of archosaurs and thus have a smaller max body size . They are actually mostly constrained by ecological limits as the bat body plan appears to work without problem up towards 3 meter wingspan in principal.

@semaj_5022 3 года назад

Yess I love topics like this. Edit: and these longer videos give me life. Love you guys!

@daniwells4195 3 года назад

I love how all the Ark players emerge in the comments on dinosaur videos ♡♡

@mlgodzilla4206 3 года назад

It’s a blessing and a curse. It gets annoying seeing them label a creature that isn’t the right one

@pollypocket3508 3 года назад

SciShow: So. You think you know what a bird is... *Me, looking at my parrot* : Yes

@angeliquebarbey8340 3 года назад

This is the best and certainly the most complete video about birds I have ever come across....and is likely to ever come across in the future.

@anuragguptamr.i.i.t.2329 3 года назад

Are phytoplanktons and zooplanktons closely related to each-other, as per their family trees? Make a video on this topic.

@tengen2251 3 года назад

No. Plancton is not a Taxonomic group of animals It is more like a way of life in the ocean. They includ all microscopic live beings that live fluctuating and carried by the tides. Phytoplancton are those who are photosyntetic and zooplancton i think a manly composed by animals, this includ even crustaceans larvae.

@jamesmiddleton8128 3 года назад

The Music For Scientists album cover art looks like the moment you turn off clipping in a video game.... or when the cid kicks in harder than you were expecting

@_ninthRing_ 3 года назад

How 'bout the truly bizarre (by modern standards) bird-like dinosaurs which had feathers, yet flew on wings of stretched skin like bats? *Ambopteryx longibrachium* was a member of the *Scansoriopterygidae* clade, which lived about 163 Million years ago in the Jurassic.

@lyreparadox 3 года назад

Yes! I wish they'd do an episode on these, I can't find much info on them.

@bm-ub6zc Год назад

Those "bird-like-dinosaurs" you're talking about aren't scientifically dinosaurs. you're talking about pterosaurs, that evolutionarily don't belong to the dinosaurs. Real bird-like dinosaurs are dromaesaurids like velociraptor etc. They didn't have bat like wings, they had feathers that were really similar to normal bird's wings.

@invalidvulture1408 Год назад

@@bm-ub6zc Actually, if you clicked "read more" you'd see they're not talking about pterosaurs, they are talking about scansoriopterygids which are in fact, dinosaurs. These creatures were dinosaurs with feathers, but also skin wings.

@randybrisendine2043 3 года назад

This is really pretty cool! I love science and and especially discussions regarding birds and dinosaur connections. Thanks!

@AliCatGtz 3 года назад

Birds are so cool.

@archive2500 3 года назад

Avian dino power!

@rickseiden1 3 года назад

2:13 "Dudes! Check it out. I'm gonna lay down in this position that they'll call 'cartoon like,' whatever that means, millions of years from now." "Ummm, what's a year?"

@YeeSoest 3 года назад

Somewhere in fossil heaven one guy is really offended by this! Cartoonlike?? "Sorry I didn't find a more adequate position TO DIE IN..."

@fevre_dream8542 3 года назад

@Scumfuck McDoucheface Name checks out...

@CistudeSuisse 3 года назад

Awesome episode 🐣

@itohjoe 3 года назад

So... Who is making a Opposite Bird Kids Book? Give me a shout out if you do :-)

@xeneoszomega8980 3 года назад

I love this guys ears keep up the good content

@SavageGreywolf 3 года назад

Archaeopteryx is basically just a chill goose.

@lancethrustworthy 3 года назад

The music collection, 'Music for Scientists', is quite good. I like it well. It's well mixed. 'Alan Parsons level' mixed.

@pierreabbat6157 3 года назад

There's Limenavis (threshold bird), which is placed just outside the crown modern birds. Someone ought to find a bird in a harbor and name it Limenornis, just to confuse people.

@osonhouston 3 года назад

The definition of transitional species.

@dylaneverett4586 3 года назад

You could call them that, yes! All the Mesozoic species mentioned in this video are side branches of a general 'trend' towards modern birds, though, not direct ancestors. But I suppose that still counts.

@NeburWolf 3 года назад

All I heard while watching this video, is that bird is the word.

@Animei9 3 года назад

Long tails sometimes help kites fly better. The toy, not the bird. But maybe it worked the same way for the ancient birds

@rickkwitkoski1976 3 года назад

Yes, long tails do help in stabilization, but at the expense of maneuverability. It's been hypothesized that pterosaurs that did not have long tails compensated with larger brains to help compute maneuverability quickly. In modern aircraft we can build planes with no tail only because of computers to help to steer and balance the plane.

@nickopeters 3 года назад

Thanks for that idea. I never thought of that.

@chrismartin3197 3 года назад

My wife always says I’m a Great Bustard. Or something like that. We have a great relationship. Life goals

@falcoperegrinus82 3 года назад

Hesperornis combined the diving ability of Penguins, the fishing ability of Mergansers and the uselessness on land of Loons.

@JamesD92763 3 года назад

I am hearing a bunch of data and supposition on these early birds, is there a similar compilation of data on the Worm? Keep up the awesome work SciShow!!!

@fionagibson7529 2 года назад

“Flightless mega-birds have been a winning strategy for tens of millions of years.” Kiwis: can we get a new strategist?

@yaaobenewaah1697 3 года назад

Velociraptor was really made into an oversimplified logo

@sampagano205 3 года назад

Love me some paraves and avealans, even if I kind of feel like paraves is the better clade to think with, because they're the ones where you have super birdlike but weird animals, but also here you can almost see like. Alternate universe birds that get really weird while being so extremely bird like I think of them almost as birds.

@rajendrakhanvilkar9362 3 года назад

Great video

@kamion53 6 месяцев назад

@2:39 ".... would been hard to tell apart from their closest dinosaur cousins....." I think it would be rather the otherway around, so dinosaurs were so birdlike that at first glance you would experience them as birds. Of course not the big Tyrannosaurs and such but more smaller raptorial ones.

@liberty-matrix 3 года назад

It's stunning to realize that everything living, including us. Are nothing more than random mutations generated by evolutionary processes over millions of years.

@dinosaurasher 3 года назад

Wow great video

@swayamlodaya6070 3 года назад

a bird is a featherless biped

@JonPITBZN 3 года назад

I would guess "evolved flightlessness approximately 150 times" and "beefy back legs" are pretty strongly related. Flight is useful but not necessary to make a bird viable, hence the wide range of birds both with and without it. With a puh-terosaur, what else are you going to make out of that body BESIDES a flying thing? I guess there are ocean rays with a kind of similar silhouette, but even those have a really different body plan.

@katrinahockman5561 3 года назад

How is this the first I've ever heard of a raptor with four wings.

@dianewallace6064 3 года назад

Stefan is funny and looks like he has been lifting weights. I learned a lot from this video about crown birds since the mass extinction event and the explanation as to why crown birds are limited in size is interesting.

@MrDavidBFoster 3 года назад

When I was a kid I said a T-Rex was a bird, and the whole class laughed at me. NOW who's laughing BI-ATCH?!

@AllosaurusJP3 3 года назад

Well tyrannosaurus is not really a bird.... But its closely related to birds tho! Easy to remember it by is like this: "this all birds are dinosaurs but not all dinosaurs are birds!" Stating a chicken is a dinosaurus would be accurate stating a tyrannosaurus is a bird is inaccurate Yeah its confusing when i explain it😂 Sorry!

@klocugh12 Год назад

Birds show why you don't skip a leg day.

@StudyWaliClass 3 года назад

very nice....................

@scifino1 2 года назад

Remember the aggressiveness of geese. Now imagine a goose with a wingspan over six meters across.

@JavierFernandez01 3 года назад

The thumbnail has the better title. Cmoon :)

@flamencoprof 3 года назад

07:53 OK, I thought, NZ's gonna get a mention here, we have LOTs of flightless birds, but sadly, no. Not even a joke about our flightless fuzzy fruit, the Kiwi.

@vi_vald_i7790 2 года назад

Early birds maybe didn't fly but evoluted from hopping/gliding to flying

@purplealice 3 года назад

So toothed birds are as scarce as hen's teeth...

@SAMURIADI 3 года назад

5:52 if you grab its beak and close, does its legs come together like a claw machine?

@danielculver2209 3 года назад

Keep one of those birds in your car for when you're too far from the drive through window

@nachocheese9328 3 года назад

"Four-winged Micro-Raptor" Whelp, I just found my spirit animal! (Emphasis on the "spirit")

@richardpaxford5792 Год назад

In the Beginning was the Word. And the Bird was the Word.

@joanhoffman3702 3 года назад

Hesperornis had to come to land at some point, to lay and hatch eggs. Chicks aren't born with gills...but it would be pretty cool if they were!

@tj4234 3 года назад

I for one am glad birds are no longer the size of pterosaurs

@d32na 4 месяца назад

Confuciosornis also one of ancient bird that live same time like archaeopteryx

@falcoperegrinus82 3 года назад

I don't really buy the bulky/heavy legs hypothesis because many birds, especially the swifts and hummingbirds, but many other families have evolved very reduced legs and feet. Like birds aren't necessarily stuck with big, heavy legs.

@caviramus0993 3 года назад

At the same time they practically can't walk.

@falcoperegrinus82 3 года назад

@@caviramus0993 They pretty much can't walk at all, which is totally fine because they have no need for it. Since these birds spend most of their lives in flight (swifts can actually sleep while in flight), they don't have much use for strong legs. Literally all their legs and feet are used for is perching or clinging to vertical surfaces in the case of swifts.

@Cthultystka 3 года назад

The last bit made me wonder... Bats have the same method of takeoff as pterosaurs had, so what is limiting their size?

@ekosubandie2094 3 года назад

Their mammalian bone structures are their only limiting factor (mind that their bones are not hollow like birds nor have air sac in it, only thin) The largest hypothetical bats that can still fly could probably never reached the size of even a medium-sized pterosaurs, unless they become semi-terrestrial or completely flightless

@CLipka2373 3 года назад

Is it a bird? Is it a plane? No, it's SUPERDINO!

@petitio_principii 3 года назад

The dino/bird distinction is so blurry now that some paleontologists have theorized that possibly some Velociraptor-related dinosaurs, maybe including Velociraptors themselves, and their bigger cousins, Deinonichus (the ones from Jurassic Park), were really the first flightless birds, having had ancient flying birds more like Archaeopteryx in their ancestry. There was at least one cladistic analysis (Mayr, 2005) that had Archaeopteryx as more basal/ancestral than those dinosaurs, making them really the first flightless birds.