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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,375 Views)
Paleop
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Paleopterix

melanosomes were found preserved in the feathers.

here's a link
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BossMan, Jake
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Son of God

What kind of biome did deinosuchus primarily associate with?
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Zoo Tycooner FR
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#Lithopédion

Tropical Rainforest or Wetlands
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Furka
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It seems to be a coastal dwelling species.
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54godamora
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I heard there are two variations of Deinosuchus:
1. The one on the east side of the mississippi( maryland area) was like a gator: eating small game, with the occcasionl dinosaur.
2.The one in Texas, Alberta, and Montana was a predator of dinosaurs, mainly hadrosaurs.

So, the eastern one proably similar to everglades, while the western version proably similar habitat only drier.

Of course, this is my opinion.
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Posted Image Flish
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Deinosuchus is known from primarily coastal environments on both sides of the Western Interior Seaway. :)
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SpookDoc
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Is there any conclusive evidence now supporting that Tyrannosaurus rex was mainly a scavenger over a predator?
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54godamora
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Yes: remeber the Edmonto tailbones that have been bitten off? Or the trike horn and frill with injuries?

To me, that says T-rex was a hunter.

However, in Valley of T-rex, they described a find that had t-rex bitemarks on the underside of a trike hip.

In conclusion, T-rex was both Hunter and scavenger

Why? Take a look at about.. Every single animal (minus man) that feeds on some form of protein, mainly flesh. They will hunt, but won't pass up a carcass.
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Komodo
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Varanus komodoensis

Most of large modern predators (bears, hyenas, big cats, canids) are mainly active hunters, but scavenge for carrion when in need. Polar bears are known by being specialized in hunting and killing seals and beluga whales, but they often scavenge in huge whale carcasses.

I think the most plausible hypothesis is that of T.rex as an opportunistic carnivore; being primarily a hunter that probably ambushed its prey as it couldn't run so fast to catch swift herbivores like Struthiomimus and hypsilophodontids, but becoming a scavenger when it had to (shortage of prey, etc.).

I don't know if there is any evidence, but I remember that in a program (Jurassic Fight Club I think) T.rex is presented as a cleptoparasite predator that scares away dromaeosaurs to steal their prey (quite like modern hyenas and skuas). Again, I don't thinke there is proof of such a behavior, but it seems very plausible as it's also present in many carnivores today.

Greetings!

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Paleodude
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ex-Krampus

Komodo
Aug 9 2015, 01:01 AM
Most of large modern predators (bears, hyenas, big cats, canids) are mainly active hunters, but scavenge for carrion when in need. Polar bears are known by being specialized in hunting and killing seals and beluga whales, but they often scavenge in huge whale carcasses.

I think the most plausible hypothesis is that of T.rex as an opportunistic carnivore; being primarily a hunter that probably ambushed its prey as it couldn't run so fast to catch swift herbivores like Struthiomimus and hypsilophodontids, but becoming a scavenger when it had to (shortage of prey, etc.).

I don't know if there is any evidence, but I remember that in a program (Jurassic Fight Club I think) T.rex is presented as a cleptoparasite predator that scares away dromaeosaurs to steal their prey (quite like modern hyenas and skuas). Again, I don't thinke there is proof of such a behavior, but it seems very plausible as it's also present in many carnivores today.

Greetings!

My only problem with your facts are that the animals you all listed off are mammalian. Personally a better comparison would be an alligator or birds of prey, both of which are closer to T.rex than a polar bear. My idea is that T.rex was an ambush predator that worked in small family groups but would scavenge when it could. Really we have no good idea and it's pretty much all speculation.
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Jules
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Mihi est imperare orbi universo

Remember that mammals can be a good comparison in this case; Tyrannosaurus was an apex predator, and as such would be closer in habits to a tiger or a polar bear than to an alligator.
It's pretty obvious that it did hunt - Edmontosaurus with healed wounds - but, like any other predator, it would also have scavenged if it could.
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Furka
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Komodo
Aug 9 2015, 01:01 AM
I don't know if there is any evidence, but I remember that in a program (Jurassic Fight Club I think) T.rex is presented as a cleptoparasite predator that scares away dromaeosaurs to steal their prey (quite like modern hyenas and skuas). Again, I don't thinke there is proof of such a behavior, but it seems very plausible as it's also present in many carnivores today.

Greetings!

I suggest you not to use JFC as a reference, most of the stuff in that program is made only to please annoying fanboys who like dinosaurs only as fighting monsters.
Plus, dromaeosaurs weren't suited to take on large preys, and the average animal they could hunt wouldn't likely interest a Tyrannosaurus a lot, unless it wanted a free snack.
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Incinerox
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Āeksiot Zaldrīzoti

On top of the notable specimens of Edmontosaurus and Triceratops that show evidence of healed wounds, it's worth noting that if it were a scavenger, it literally would not be able to get the energy it needs.

There are no other large carnivores in Hell Creek. The next largest was Acheroraptor, which wasn't exactly much larger than Velociraptor itself.

For T. rex to get enough food each week just to survive entirely off scavenging, either everything just dropped dead at an alarming rate, or small predators like Acheroraptor not only had to kill disproportionately large animals, but on a regular enough basis that a T. rex could find their disproportionately large kills and take over the carcass. And that would mean taking on a tiny wee thing that would be regularly killing T. rex sized prey.

By all accounts, the maths required for T.rex to ONLY scavenge to survive is INSANE.
Edited by Incinerox, Aug 9 2015, 08:34 AM.
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54godamora
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So, jack horner is wrong? And everyone else is right?
By that, i mean views on t-rex's feeding habits.
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heliosphoros
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Already discussed to be the case since the early 2000's.
Edited by heliosphoros, Aug 9 2015, 09:44 AM.
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