From the Documentary "MISSING 411: The Hunted" which follows a large number of strange Missing Person reports clustered around National Parks and Forests.
Audio recorded by a Hunting Party in 1971, deep within the forest a few miles outside of Yosemite in California.
This occurred for over a year during these hunting trips, then stopped, as if the animals vacated the area.
Audio was verified as genuine/untampered by Dr. R.
Lynn Kirlin (Professor of Electrical Engineering, University of Wyoming) and recorded decades before digital audio effects were available.
Analysis found that the pitch/sound were way above human levels.
Large sticks are heard being banged against trees.
"Whoops" and calls give way to a strange, almost 'Asian sounding', language at times.
The animals that made these sounds never got closer than 50 to 100 yards, staying out of sight from the hunting camp and have yet to be identified.
Yosemite National Park has the highest number of people who go missing in the forest each year.
Many of them are never seen again.
These disappearances tend to follow peculiar patterns: