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Re: T rex as scavenger (again....)
>I took notes during Horner's "T.rex as scavenger" talk; his points are
>summarized below. I am still unconvinced, but I now have a much better
>appreciation for that viewpoint. His arguments are:
> - Predators *need* arms to catch prey.
> T.rex arms are too small, with too limited movement to be used
> to catch prey.
Must be a lot of hungry birds out there! I wonder how the phorusracids managed?
> - Predators need good vision, therefore large eyes.
> T.rex had comparatively small eyes, and small optic lobe.
Um, how good does your vision have to be to spot a full-sized dinosaur in
> - T.rex had unusually large olfactory lobe; implies especially
> acute sense of smell. Only 2 other animals in history ever had a
> proportionally larger olfactory lobe: kiwi and turkey vulture,
> one of which is a scavenger.
And the other of which isn't. Not too convincing. Besides, maybe its prey
> - T.rex teeth are often found among mono-specific bone bed sites;
> implies T.rex was scavenging the mass deaths in herbivore herds.
I don't think there is any reason to say T. rex never scavenged. Hyenas
both hunt and scavenge. So do lions.
>These are good arguments, but I believe there are good rebuttals to each.
>Certainly T.rex scavenged opportunistically, but I still don't buy Horner's
We'll never know, but I doubt it.
Ronald I. Orenstein Phone: (905) 820-7886 (home)
International Wildlife Coalition Fax/Modem: (905) 569-0116 (home)
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