Sensory capacities of the chimpanzee: A review.
Prestrude, A. M.
Psychological Bulletin, Vol 74(1), Jul 1970, 47-67. doi: 10.1037/h0029404
  1. Summarizes and evaluates available information about the chimpanzee’s sensory abilities. Investigation of the chimpanzee’s sensory processes has been limited mainly to vision and audition. Where reliable information is available, the sensory systems of the chimpanzee and human are highly similar in structure and function. Chimpanzees, like humans, are trichromats and each has similar visual acuity. Perceptual phenomena, i.e., color and brightness contrast and movement, appear to be similar functions. Absolute auditory thresholds are similar for chimpanzees and humans, but the chimpanzee can apparently detect higher frequencies than the human. Only qualitative observations are available on the functions of the chimpanzee in the other sensory modalities so that chimpanzee-human comparisons in these modalities are largely conjecture. (4 p. ref.) (PsycINFO Database Record (c) 2012 APA, all rights reserved)

IDA Complaint to Air Force in Advance
of Award of Chimps to TCF

No other bidder for the Air Force chimps even comes close to TCF’s crushing long-term financial burden of owning 450-500 chimps. That is tens of millions of dollars in long-term financial liability that must be considered as debt by the thorough financial audit the Air Force is no doubt conducting on all bidders (such an audit would be mandated by the RFP’s strict financial criteria and Congress’ intent that the recipient must provide “adequate care,” which can only occur with necessary funds). (Such an audit should of course also consider any taxes owed, any outstanding debts, provable cash flow, etc.) Does TCF come even close to having such money — and remember, this is liability it already has, without owning a single Air Force chimp? It should be noted that in a May 1994 NIH site visit report (available upon request), TCF told the site visitors that it would cost $17 million for the lifetime care of 150 Air Force chimps. Remember, this was in 1994 dollars, and also did not mention buildings, but simply care. That $17 million may be high, but it is not out of the ballpark. Now multiply that $17 million — or even $10 million — by three, and that equals the long-term financial liability that TCF currently has with its ownership of 450-500 chimps