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Re: [dinosaur] Agressive behavior of the T. rex

There is also the issue of prey recognition. A hungry Tyrannosaurus would see a regular meal in a hadrosaur, it's being a big meal all the better. The human might not trigger a chase response the way say a human sized Thescelosaurus would. If on the other hand the Tyrannosaurus was not looking for lunch it might go over to check out the little human and see what's up. 

If it were a choice between a human sized and an elephant sized ornithopod, the former is harder to catch but easier to kill if it is caught, since it could be eaten in one gulp would not have to be defended as a carcasse against other Tyrannosaurus, and would be a good solid meal for a day. There is no means of determining what choice the Tyrannosaurus would make. 


-----Original Message-----
From: Jura <pristichampsus@yahoo.com>
To: dinosaur-l <dinosaur-l@usc.edu>; tholtz <tholtz@umd.edu>; Poekilopleuron <dinosaurtom2015@seznam.cz>
Sent: Fri, Sep 20, 2019 5:47 pm
Subject: Re: [dinosaur] Agressive behavior of the T. rex

These are all unanswerable questions. T. rex wasn't a machine, it was an animal. The choice to eat a person vs. a larger prey item would depend entirely on the context of the situation. How big was this T. rex? How hungry was it? How angry, jumpy, curious, etc.


On Friday, September 20, 2019, 11:42:54 AM CDT, Poekilopleuron <dinosaurtom2015@seznam.cz> wrote:

Good day to all listmembers!

Just a short question - given the apparent agresivity of the Tyrannosaurus rex (adult individual), but also the fact, that human would be too small a prey for it - would it be perhaps "safe" for us to stand near it? In other words, if T. rex had a choice of attacking human some 20 yards away and a subadult 1 tonne Edmontosaurus 100 yards away, which one would it choose? Was there some size/mass limit for an animal, at which it would be not interesting as a prey item for an adult T. rex (or any other large theropod, for that matter)? Thank you in advance! Tom