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Vocalization in Arizona (2014)
At dusk on the first night at the research camp, the witness heard a distant roar or yell with the unaided ear. A short time later a second vocalization was captured on the recording equipment. When cleaned up later it sounded non-human with a very deep ending and did not match known animals.
Vocalization
Possible vocalizations heard in the Bradshaw Mountains (w/recordings)
The witness was camping alone overnight and heard repeated strange calls late at night over about 35 minutes that seemed to move closer. The sounds did not match known local animals to the witness. The witness captured part of the sounds on a digital voice recorder and searched the area the next day without finding other campers.
Vocalization