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"Tyrannosaurus was not strictly a predator"

Something jumped out at me that seemed unusual in the latest on the Hell Creek 
fauna, Horner, Goodwin and Myrhvold (2011):

"This census suggests that *Tyrannosaurus* was not strictly a predator, but 
instead more of an opportunistic feeder, possibly selecting similar food 
choices under circumstances comparable to that of hyenas in extant ecosystems, 
a trend unrecognized in earlier census studies."

  How many papers were published, or articles in books written, to describe 
precisely this following Horner's seminal argument in _The Complete T. rex_ and 
the follow-up paper in 1994 (cited below), rejecting the sole-scavenger 
hypothesis? In citing a response to this hypothesis (Ruxton and Houston), they 
merely affirm positive capability of scavenging sustainability through carrion 
(by using a copy-and-paste model of Serengeti = Hell Creek) and do not cite 
other, more numerous contradictions of the sole-scavenger hypothesis. This has 
the added effect of affirming the work as a contradictor (as quoted above) of 
the sole-scavenger hypothesis presented by the first author.

Horner, J. R. 1994. Steak knives, beady eyes, and tiny little arms (a portrait 
of *Tyrannosaurus* as a scavenger). _The Paleontological Society Special 
Publication_ 7:157–164.
Ruxton, G. D. & Houston, D. C. 2003. Could *Tyrannosaurus rex* have been a 
scavenger rather than a predator? An energetics approach. _Proceedings of the 
Royal Society of London, Biology_ 270:731–733.

Also, as seen here 
 something else jumped out at me, but not so unusual. Rather par for the 
course, but treated as unusual.


  Jaime A. Headden
  The Bite Stuff (site v2)

"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)

"Ever since man first left his cave and met a stranger with a
different language and a new way of looking at things, the human race
has had a dream: to kill him, so we don't have to learn his language or
his new way of looking at things." --- Zapp Brannigan (Beast With a Billion