on mountainboomer.com it says:
The early pioneers thought collared lizards were poisonous, and called them "Mountain Boomers" in the erroneous belief that these lizards were the source of unknown loud noises coming from rocky hillsides. Whatever those mysterious noises turned out to be, they weren't coming from the lizards, as they make no such loud noises.
it does not necessarily say that another animal made the noise but perhaps there were wolf raised humans who were confused when they saw a species similar to them that acted totally different and they were trying to call out to them. just a thought....or maybe it is the cold medicine.
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vonnie
***One of the advantages of being disorderly is that one is constantly making exciting discoveries. - A. A. Milne***