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Vocalization in South Dakota (2014)
A man living alone reported ongoing activity including footsteps on the porch, grunting, tapping, rocks thrown and objects pushed over. He recorded audio through a window without looking outside. The investigator visited and noted the isolated setting and admitted the sound did not match known animals.
Unusual howls recorded in the Black Hills southwest of Rapid City
The witness returned home in the evening and heard an unfamiliar ululating howling sound with an echo off a nearby cliff. The witness recorded about 4.5 minutes of the sound. With decades of outdoor experience, the witness did not recognize it as any known local animal and noted dogs reacted negatively.