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Large Mesothermic Birds?; How big can birds get?
Topic Started: Jul 14 2017, 11:20 AM (1,633 Views)
9Weegee
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I'm making a spec Evo project called the Lateoic, and the dominant species is birds. I want to make a large type of bird, but I need to know how big flightless birds can get.
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Gojiratheking106
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11 degrees Celsius on average doesn't sound like Tanzania to me.
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LittleLazyLass
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You are correct on the Nemegt Formation not being a desert.

Can you please cite something that states we know where the neck integument came from? Like, a proper source, in text? A diagram has to represent it somewhere on the neck, so of course it will come off as looking like we know where it came from.

I already gave you a source from someone reliable saying that the scales might not be integument, which would make the whole argument moot. Here's some more discussion on ways the fully scaly tyrannosaur idea could be wrong, read the comments. This blog posts agrees with the same sentiments that everyone here is telling you, that we just don't know. Trey the Exlainer's video is good, and you cast it aside just based on who made it rather than trying to refute any of its points.
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Gojiratheking106
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I think we should take this to another topic or something tho. This was about Mega birds.
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Dragonthunders
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It would be the most appropriate thing, however it seems to me that he only tries to keep the point of tyrannosaurs were completely scaly for reasons unknown to me, I am already doubting that this conversation will reach to somewhere, I emphasize it as he is inferring the Climate of the areas where each specimen was found were warm and more by this phrase

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Also yutyrannus is not a tyrannosaur, its a very large proceratosaur.

I'm little sure that it was classified as a Tirannosauroid.

For me it seems that for him the feathers in tyrannosaurs do not fit.
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Gojiratheking106
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Proceratosauria is within Tyrannodauroidea, so yeah, it's kinda like cats and tigers. Note in kinda.
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LittleLazyLass
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Yutyrannus as a proceratosaur has been suggested, but it's hard to say whether that or a position closer to Tyrannosauridae is more correct.
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Nyarlathotep
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Yeah phylogenetic branching is not always that reliable for determining things such as integument. Spinosaurus for example clearly bucks the trend of long legs on Spinosaurids. So it's possible that nanuqsaurus was indeed feathered on a convergent way with Yutyrannus, while T.rex mostly lacked them.
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9Weegee
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Let's get back into the bird discussion.
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Nyarlathotep
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I stand by my first statement in that case. I think feathered or not depends on the environment. Feathers are better at regulating than fur, but they still have a limit as to how necessary they are.
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kusanagi
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OTOH only, modern birds never got larger than the largest elephant birds, mihirungs and moas all of which GSP claims are of a similar weight. There was a paper arguing why this is the upper size constraint but if so, re-evolving a long tail ought to be a much easier workaround than re-evolving teeth or grasping hands.
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WaterWitch
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9Weegee
Jul 15 2017, 08:30 AM
Also yutyrannus is not a tyrannosaur, its a very large proceratosaur.

Hell creek and the Nemegt formation were pretty similar in climate. (The nemegt formation is what tarbo is from.) Think of hell creek like the Louisiana bayous, and the nemegt is a wetland similar to Tanzania. The two medicine and other formations in Canada don't really have any cold areas. Remember that the Cretaceous was warmer than today.
Protoceratosaurids are within Tyrannosauroidea, So they're somewhat similar to the ancestral forms to Tyrannosaurids.

I've also heard something of back impressions of Albertosaurus having some of follicles, which might suggest feathers.
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