The World Used To Be Full of Giant Tortoises
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- Опубликовано: 26 сен 2024
- The world used to be full of giant tortoises, and the ones that live on the Seychelles and Galápagos islands are all we have left. But how did these big reptiles get to the islands in the first place? And why is turtle anatomy so weird?
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Do you need a tortoise (and raven) bandana?? Get yours here! complexly.store/products/raven-and-desert-tortoise-bandana
When I was a kid, the teacher had us all stand up and tell the class what we wanted to be when we grew up, and after a litany of police, firemen, soldiers and sports stars, I stood up and proudly declared I wanted to be a tortoise.
Over 40 years later, I still stand by that declaration.
Did you succeed?????????
Same, tbh
Do you play War Tortoise 2 on Android?
How big are your ribs?
I know at least two zoos that have a (fake?) giant tortoise shell on display that you can crawl into. That way you can test if a tortoise life suits you.
You mentioned Komodo dragons being a case of insular gigantism, and while this is partially true, what's fascinating is that they are actually an example of insular dwarfism as well! Komodo dragons and their relatives were once widespread throughout South East Asia, and even into Australia. The ancestors of modern Komodo dragons likely reached their massive sizes on an island in SEA, but when they reached the tiny island of Komodo, they actually shrunk! So islands helped Komodo dragons reach their huge size, but they also shrunk em down a bit, and I find that to be fascinating.
That's very interesting! I'd only add that the video didn't precisely say Komodo dragons are an example of insular gigantism, rather that they're an example of Foster's Rule / The Island Rule (2:05), which covers bigger animals getting smaller and smaller animals getting bigger 😊👍
This is not completely true. While monitor lizards as a group likely originates in Asia, the lineage which Komodo dragon belongs to (along with things like perentie, lace monitor and ackie monitor) evolved in Australasia in a single radiation event. There is in fact fossils of Komodo dragon itself in Australia. And like the giant tortoises, Komodo dragon's range expanded into the Flores islands, and later going extinct in the island continent where they came from, making those surviving today a relic population.
Can I just say this is an amazing conversation of umm actually. And I greatly appreciate it. Herpatology rules!
@@vincentx2850 also the closest relative we know komodo dragons ever had is Megalania, the largest lizard to ever live (on land). Which means the common ancestor of all of those monitors was probably also a giant.
@@vincentx2850 Exactly right, although unless I am getting my information mixed up (which is totally possible) that komodo dragon fossils found elsewhere in australasia are indeed larger than modern individuals in komodo. Again, totally possible Im misremembering something though. Thank you for elaborating on it though!
Something to note. This video says giant tortoise didn't exist in Australia. While it it true that giant tortoise didn't exist in Australia, this might be mostly due to the fact that niche was already occupied by stem tortoise, cousins of tortoise such as the giant meiolania, that existed there. They had horns and club like tails, pretty cool.
And they existed on offshore islands until the mid-Holocene (New Caledonia, Lord Howe Island and possibly Vanuatu and Fiji)
Neat! I smell a good eons episode
Meiolanids are not tortoises in the strict sense and in fact sit outside the clade of modern turtles. They were terrestrial turtles but not tortoises. Now, some records previously attributed to meiolanids from Vanuatu islands we now think that they actually belong to tortoises! How did they get there is another story…
They were basically Ankylosaurs
This is exactly the turtle content I've been craving! Turtles and tortoises are the best! 🐢
Very accurate observation!
I was paddle boarding in Kauwaii several years ago when I observed a shadow in the water of to my right. I was initially scared it was a large shark but then as it swam underneath me I got a good look and it was a very latge turtle of some type. It was so big and beautiful that I was ecstatic to have had the opportunity to see it so closely in its natural environment unmolested.
As a child of maybe 5 or 6 years, my family and I went to a zoo in Stuttgart. As a curious child, I went ahead of my parents in the reptile enclosure. When I see this huge tortoise my younger me just HAD to sit on that beautiful creature. The shell was super warm and felt extremely comftable. A minute or so later some adult person told me I should not do this, they can bite off fingers.
Big sad. I felt like I found a new buddy
Technically, there was a giant tortoise in Australia, the Meiolania, though it is not closely related to the modern turtles. Instead its a stem-turtle whose group is a sister-taxon to the modern Chelonia.
"There used to be giant tortoises on every continent, except for Australia and Antarctica."
Meiolania, the Horned Tortoise: "Am I a joke to you?"
you should do an episode on the grasshopper nematode (Mermis nigrescens). with their unique method of locomotion when scanning for hosts and its atypical snake-like slithering otherwise, its thousands of eggs carried at a time, and its eye which only occurs in females and use of crystalline haemoglobin to help sense light (something not observed in any other organism), there is plenty to talk about. i reckon it could make a neat little pin, too.
Still the greatest channel on RUclips. I'm having a terrible day (again) and this video really helped calm me down (again).
Sending you love and hope you feel better soon. 💜
@@sydneymomma11 Thanks ♥️
Hope you are feeling better!!!
@@BizarreBeasts I'm a little better after the weekend, thank you. I think I should probably get a new job, teaching and marking at the uni I'm at is killing my spirit for education.
I dont like them creepy we should extinct them
I had the honor of meeting two Galapagos tortoises at a rescue in Los Angeles. They are so sweet. So sad their numbers are so low.
I know this will sound crazy but I live in Minnesota and in 1998 or 1999 I was driving through the area around fort ripely near pillager mn. Suddenly I saw a van stopped ahead of me on the side of the road so I slowed down as I got closer I could see what looked like a bear laying in the middle of the road. When I got closer I could see it was shiny and not furry. It was a giant turtle and it was the height of the wheel well of the van and twice as long. It was huge. I didn’t have a cell phone back then but I took notice of how large it was based on how close to the van it was. They say this turtle does not exist but I saw it. It looked like a box turtle in its shape and I never saw its head as it was turned away. It was awesome.
In much of North America there was a a giant tortoise called Hesperotestudo crassicutata that existed from the Early Miocene until terminal Late Pleistocene or perhaps even into the Early Holocene about 9000BCE. It was more than twice the size of the Galapagos Tortoise.
Thanks for putting the calendars on offer! I have now ordered one. When shipping to the UK was £11 on top of the £22 calendar price that seemed a bit much but now I can basically get it with free shipping (£22 all in) and that makes me very, very happy. Happy New year and much love
Would you like your own giant tortoise pin?! Join the pin club today at store.dftba.com/collections/bizarrebeasts/products/bizarre-beasts-pin-subscription-1
Hi! I'm in the pin club and would LOVE for you to cover Vulture Bees, they feed off meat and I've heard their meat-honey is edible!? Please explain 😂
Australia had Giant tortoises, just not in human history.
I love turtles and tortoises. This is by far my favorite pin, and I don't even have it yet.hoping I get the green one, but the rainbow one is cool too.
Find your wonderful, signed, limited edition art print by Emily Graslie right here: store.dftba.com/collections/bizarrebeasts/products/emily-graslie-print
In australia there's a giant tortoise called the meiolania that went extinct when we arrived there
Imagine, you’re stuck in a frozen pond & you have to take in cold water through your cloaca so you don’t die. Brrr
The rare tortoise pin looks like he has a quilt for a shell, I need him ❤
i hope you get him!
There are still some rather large mainland tortoises alive today like the African spurred tortoise, even leopard and gopher tortoises are somewhat large even if not as gigantic as the island species.
They move like they're being puppeted.
I always learn something here and something both interesting and thought provoking.
Thailand still has mini giant tortoises. They are nothing like the ones in this film but they can get a few feet long and stand a couple feet tall
This was a delightful video, thank you
IM SO HAPPY !!!!! NEW VIDEO AAAHHHH
An easy way to tell the difference between Aldabra and Galapagos tortoises is their head shapes. Aldabra Tortoises have a pointier nose, whereas Galapagos Tortoises have a head that looks more like E.T. You can remember this by remembering than an Al*Dab*ra tortoise noise looks pointy, like how your folded arm is, when you dab on 'em.
Lol thank you so much.
Dabbing tortoises 😂
Does fosters rule work on spiders? I don't want us to discover a 1 meter huge spider
Oh I was hoping this episode would be about that car sized tortoise that lived along side titanaboa
The Komodo dragons are actually the smaller cousins of the now extinct Megalania prisca giant goanna in Australia. So rather than island gigantism they may just be a remnant smaller population of megafauna.
There is no oogway
-Master Accident
In a museum in Florida I saw a fossil shell of a giant tortoise from the Pleistocene.
Very interesting, I mean, Bizaaaaare.
Hello 👋 how’re you doing?
I love these guys they look like dinosaurs
When did tortoises go extinct in most places? Are they among the megafauna that went extinct as soon as humans arrived in the area and hunted them?
Human expansion in the broad sense, which includes other Homo species like H. erectus, is a possible cause. Climate fluctuation is another possible cause.
In Mauritius. They take 100 giant turtles. From the Sechelles
I like tortoises and turtles so much!
tortoises are some of my favorite reptiles. I've always wanted to own one, but knew I couldn't have a giant one to love and care for as the winter months just wouldn't allow the magnificent creature to graze outside (with food I'd provide to ensure a balanced diet) during the cold. And I just think it'd be cruel to coop up a giant beauty inside, for either of us really. So I stick with my snake, who I love dearly as well.
Some good fun info thank you 😊
2:15, Komodos are not a good example of this effect, just like the tortoises they were already massive before moving to the islands, with bones of Komodo dragons of equal size to the ones we see today being found in Australia and dated to exist 4 million years ago, far before they moved to Flores and Komodo, showing they originated in Australia and no island gigantism existed in their evolution
Must be a different time when giant lumbering beasts can thrive. Maybe a bunch of smart monkeys noticed they were easy pickings
More videos of tortoises swimming please
...What about the salt in the seas tho? Like crocodiles developed special glands. I believe marine iguanas also did iirc.
RUclips commercials just keep getting longer and longer and louder and louder
Mild correction here, there were giant Australian tortoises belonging to the genus Meiolania, with the species M. platyceps reaching up to 3m in length and 1 in height
Connor aka cdawgva would love to see this vid
Shoulder blades inside the rib cage is wild.
Great video
4:17 My new indie pop rock band
God Bless Hank. Get well soon!
Trilobites!!! The world was covered in Trilobites for hundreds of millions of years.
👽
Breeding programs to conserve the species would be beneficial
PLEASE GOD ALL I WANT IS THIS PINK TORT PIN PLEASE
*Go Indonesia!!*
From Bandung, Indonesia
One of the locations for their development could've very well had been America because this whole land was once called turtle island
Wildlife is a trip
It must have been so lovely to be the 1st human to set foot in places like the Galapagos, Seychelles, New Zealand, New Caledonia, Easter Island, etc.
I wish the world was bigger, so I could go find my own tropical island. I don't like living with all of you.
Being slow moving and delicious was not a good evolutionary trait.
The giant tortoise is like a living Dinosaur!
Baby birds can't catch a break.
Don’t forget about the tiny Deer in the keys
I shall wait much for new videos about tortoises ok send soon thankyou
This remind me of the episode on The Boys when they killed translucent and stuck TNT in his but like a turtle cause he was invincible
Hey how about a video about armadillos? Their armour is incredbile, I'd really like to understand more.
Hank actually did do an armadillo video when this show was just part of vlogbrothers! ruclips.net/video/iZCX8tt3LhQ/видео.html
@@BizarreBeasts ah thank you very much I must've have missed that one!
Please do a Muntjac 🥰
Well, the biggest tortoises are still around. They stand on each others backs and the world balances on top of them.
It's Tortoises all the way down
When did Rodriguez island giant tortoises become extinct?
Dang it I missed the pin 😭
Hank Green? More like Hank Turqoise
Also PLEASE never ever take your other non giant landliving turtles and expect them to be OK in deeper water! They drown! Non aquatic turtles (other than above named giant ones) just drown!! I cannot stress this enough!!!
i love the little pin on your shirt :3
Turtle and tortoises are some of my favorite animals!
I feel like leopard tortoise and sulcata tortoise deserve to be on the list of giant tortoises because Even though they're significantly smaller than their island living cousins, they're still really really big tortoises.
Don't forget the Burmese mountain tortoise (i have 2), bigger than the Leopard.
Are Sulcata and Burmese tortoises not considered "giant"?
They make an nice soup
A predator of birds? 😂 It would have to be the slowest and dumbest bird ever to get chased down and gobbled up by a giant tortoise.
As they mentioned, baby birds. They happen to be very slow and some species have nests on the ground. AND sometimes these giants stand up on their feet (e.g. during rain) and a bird hiding below gets .... well... squashed n eaten, cause why not. At least one caretaker of such giant tortoises mentioned such story of chicken having gotten eaten that way (ToT)
Use to be full of them till we ate them all
Why y’all not representing my boy the salcata tortoise those are giant tortoises also
1:18 even hardcore herbivores can't stand sticking to vegan diets.
Guess I need to buy a bunch more pins this month lol
you cant buy them you gotta subscribe and youll only get one sadly but its a cool subscription! i have the subscription :)
@@bugguyonline I mean, you could subscribe multiple times...
Komodo dragons are no longer considered to be a kind of island giant now, because the fossil record shows that they actually evolved on the Australian mainland at relatively the same size. If anything they shrank on Komodo Island but that's by a very small amount.
i like toitles
Almost everything eats baby birds, herbivores included. If it’s not in its nest, it’s just to easy to pass up.
Tortimer...
Not about small tutules
i sadly havent gotten my worm pin yet but im hoping i get it soon and that i get the tortoise too!
international beasties have it hard haha
I'm in the UK and my worm pin arrived yesterday so I am sure yours is imminent! It's a cute little guy!
Evolution is a theory.
Just like your book of mythology.
If we delete videos about tortoises dont think we hated videos ok read all sms carefully
Does this man sleep? Hank may have the most hours of scripted video content on RUclips.
tortoise
Dog?
Large deposits of fats and slow metabolism
Sounds alot like what happened to humans.
Send more informations soon with in two days about large tortoises deep informations in urdu language
I'm scared of turtles
D'awe🐢💚🥰
Believe me i am not angry but i want informations qbout large toetoises no small turtules