u/Vegetable-Idea7648

I am u/Vegetable-Idea7648 and I created the r/AllOurYesterdays subreddit about our hypothetical reconstructions of extinct creatures, our hypothetical 99% creatures that didnt fossilize, and how aliens would reconstruct todays animals if they didnt have photo or video evidence of how our animals looked. would any of y'all recommend I tell people about my subreddit.

If its true that Oviraptorids and pennaraptora werent secondarily flightless than why is it that they have a flight-worthy feather count of up to 9-11 primaries on their hand when flightless birds either have less or more primaries on their hands

Earthflight's intro

I think Earthflight is very underated when it comes to documentaries on birds or the living dinosaurs. We'll yeah, some people might not like the scottish accent the narrator David Tennant has, but Earthflight in my opinion dose a good job at showing life on the wing on modern dinosaurs and showing the challenges they face wether its on migration or trying to get food and I think it shows the living dinosaurs behaviors quite well and gives the feeling that were flying with the living dinosaurs.

I mean think about it, a lot of kids shows with dinosaurs in them show these inaccurate, 90s era depictions of our favorite reptiles. I do know there are some kid shows, like Dinosaur Train, which actually attempt at showing an accurate depiction of these animals like adding feathers on some dinosaurs, but Dinosaur Train's depictions are mostly no longer accurate to what paleontologist now think and they have a Troodon which Troodon isn't a valid genus and for a Troodontid, that character lacks feathers. I think we should have a kid show about dinosaurs that potrays them to be accurate to what current science says they should be potrayed as as I think its important we show the kids what accurate dinosaurs look like rather than keep showing them these 90s and early 2000s depictions that are no longer accurate to what we think dinosaurs look like now

I agree with a theory made by some paleontologist, dont know their names, that dromaeosaurs and troodontids are secondarily flightless and share a common ancestor with avialae and I think I have some evidence to prove it

1. If you look at the tails of dromaeosaurs and troodontids, you can see a higly reduced tail compared to earlier theropods like T.Rex or Allosaurus. Why would these dinosaurs have such highly reduced tails and still maintain these highly reduced tails if they were not secondarily flightless, wouldn't they just increase their tails for a bigger caudofemoralis and why would they need a reduced tail? in fact dromaeosaurs still keep bony rods on their tails like many earlier pterosaurs, which are known to have flown. could this mean dromaeosaurs and eumaniraptora as a whole are secondarily flightless creatures that came from a common ancestor capable of some form of flight.
2. The dromaeosaur zhenyuanlong has feathers on its arms that resemble the wings of flying birds which why would a flightless predator have wings that look like those seen in flying animals and velociraptor was discovered with quill knobs and quill knobs are only found on flying birds and are completely lost in ostriches and most ratites. And not only that paraves also have a propatagium on their arms which is only found in flying birds and is reduced or absent in flightless birds not too mention we found flying dromaeosaurids like microraptorines to be very basal amongst dromaeosaurs and a flying troodontid known as jinfengopteryx. and deinonychus juveniles are capable of flight.
3. If you look at dromaeosaur and troodontid skeletons they share a high resemblence to the skeletons of basal avialans and basal birds and they share many features with them like claws on the wings and a primitive looking pelvis that still has a somewhat dinosaurian look while having a backwards facing pubis unlike the ones seen in modern birds and dromaeosaurs and troodontids share a long tail like many basal avialans like archaeopteryx and jeholornis and a wishbone like in all theropods and birds. If dromaeosaurs and troodontids were closely related to avialae, could this have mean all paraves share a common ancestor that could glide and split off from each other and lost flight multiple times independently to fill different niches?

I've always wondered what the claws on the wings of many basal pygostylains were for? I mean these things were flight capable and yet they still had claws on their wings. What were they used for? what function did they serve since they couldnt grasp things with their front limbs considering they used the front limbs for flight.

Here are some examples of that iditot's blatent denial of science that shows us birds are dinosaur

example 1.

here's example 2

Like how can you be this dumb enough to think that birds are not actually living dinosaurs. How would you respond to this idiocy

What kinds of creatures could evolve on a island were there were no other dinosaurs and Dromaeosaurs and Troodontids were the only dinosaurs on that island? Me personally I imagine Troodontids filling most of the herbivore and omnivore niches like the various flightless birds on New Zeland with a curtain genus of Troodontids growing large and filling the niche of the moa but not as large as any sauropod due to resource limits and posture limiting size while Dromaeosaurs would fill the predatory niches with small microraptorines preying on small troodontids while a big Dromaeosaur that was like Utahraptor and flightless or a large, giant flying Microraptorine filling a similar niche to Hasst eagle being the size limit of how big flying microraptorines and basal paravians as a whole could get and still be capable of flight.

different Dromaeosaurs by someone who I dont know his name

Prehistoric Planet Troodontid

Here are some examples of that iditot's blatent denial of science that shows us birds are dinosaur

example 1.

here's example 2

Like how can you be this dumb enough to think that birds are not actually living dinosaurs. How would you respond to this idiocy

Describe in detail how birds got their signature crouched leg and mostly knee driven style of walking from the earilest Triassic theropods to Coelurosauria to Paraves to modern birds

Why is it that Eumaniraptorans that arent Avialae have thinner tails with a more reduced caudofemoralis muscle and less caudo vertabrae on the tail than something like T.Rex or Allosaurus. I know most Eumaniraptorans with the exception of Utahraptor, Austroraptor, Achillobator and others are small but compsagnathus is one of the smallest ceolurosaurs and it has a pretty sizeable caudofemoralis muscle and thick tail for its size and it has way more tail vertabrae than any parave of its size that isnt avialae

Deinonychus Skeletal by Scott Hartman

Utahraptor Skeletal by Scott Hartman

Compsagnathus skeletal by Scott Hartman

Stenonychusaurus Skeletal by Scott Hartman

Sinosauropteryx skeletal by Scott Hartman

I agree with a theory made by some paleontologist, dont know their names, that dromaeosaurs and troodontids are secondarily flightless and share a common ancestor with avialae and I think I have some evidence to prove it

1. If you look at the tails of dromaeosaurs and troodontids, you can see a higly reduced tail compared to earlier theropods like T.Rex or Allosaurus. Why would these dinosaurs have such highly reduced tails and still maintain these highly reduced tails if they were not secondarily flightless, wouldn't they just increase their tails for a bigger caudofemoralis and why would they need a reduced tail? in fact dromaeosaurs still keep bony rods on their tails like many earlier pterosaurs, which are known to have flown. could this mean dromaeosaurs and eumaniraptora as a whole are secondarily flightless creatures that came from a common ancestor capable of some form of flight.
2. The dromaeosaur zhenyuanlong has feathers on its arms that resemble the wings of flying birds which why would a flightless predator have wings that look like those seen in flying animals and velociraptor was discovered with quill knobs and quill knobs are only found on flying birds and are completely lost in ostriches and most ratites. And not only that paraves also have a propatagium on their arms which is only found in flying birds and is reduced or absent in flightless birds not too mention we found flying dromaeosaurids like microraptorines to be very basal amongst dromaeosaurs and a flying troodontid known as jinfengopteryx. and deinonychus juveniles are capable of flight.
3. If you look at dromaeosaur and troodontid skeletons they share a high resemblence to the skeletons of basal avialans and basal birds and they share many features with them like claws on the wings and a primitive looking pelvis that still has a somewhat dinosaurian look while having a backwards facing pubis unlike the ones seen in modern birds and dromaeosaurs and troodontids share a long tail like many basal avialans like archaeopteryx and jeholornis and a wishbone like in all theropods and birds. If dromaeosaurs and troodontids were closely related to avialae, could this have mean all paraves share a common ancestor that could glide and split off from each other and lost flight multiple times independently to fill different niches?

I mean we all know that if todays animals could talk, they'd probably have had a negative opinion of humans. But what about dinosaurs? I mean they havent have ever seen a human before. What would they say about humans?

1. Oviraptorasaurs had a shorter tail than most theropods and having a short tail is only seen in birds which walk with a crouched leg position because of the short tail shifting their center of mass foward.
2. Both Troodontids and Dromaeosaurs had reduced tails with the caudofemoralis being more reduced than in T. Rex or Allosaurus and a reduced tail is seen as one of the changes that led to a more crouched posture adopted in birds
3. Oviraptorids, Dromaeosaurs, and Troodontids both poses long and robust arms and a study by a team from the University of London's Royal Veterinary College found that the reduction of the tail wasnt the main cause in the posture shift to the more avian condition but instead it was the growth in size of the arms and the arms becoming more robust to allow them to be used as wings
4. The only soft tissue we found in all 3 groups of dinosaur is feather impression. We dont even have preserved muscles, skin, fat, and organs from all three of these groups and the soft tissues can affect an animal's center of mass so in life the center of mass for these animals could have been far more foward than what the bones or computer models that estimate center of mass suggest

https://preview.redd.it/wsdc839qpa7h1.png?width=327&format=png&auto=webp&s=956b98141252690976e00eca04e25f504dcff992

1. Oviraptorasaurs had a shorter tail than most theropods and having a short tail is only seen in birds which walk with a crouched leg position because of the short tail shifting their center of mass foward.
2. Both Troodontids and Dromaeosaurs had reduced tails with the caudofemoralis being more reduced than in T. Rex or Allosaurus and a reduced tail is seen as one of the changes that led to a more crouched posture adopted in birds
3. Oviraptorids, Dromaeosaurs, and Troodontids both poses long and robust arms and a study by a team from the University of London's Royal Veterinary College found that the reduction of the tail wasnt the main cause in the posture shift to the more avian condition but instead it was the growth in size of the arms and the arms becoming more robust to allow them to be used as wings
4. The only soft tissue we found in all 3 groups of dinosaur is feather impression. We dont even have preserved muscles, skin, fat, and organs from all three of these groups and the soft tissues can affect an animal's center of mass so in life the center of mass for these animals could have been far more foward than what the bones or computer models that estimate center of mass suggest