On September 29th, 2015, between 3 and 4 a.m., we heard a series of "whooping" sounds, followed by the sound of a cow in distress.
The sounds were very clear. We had never heard this "whooping" sound before. My dad, who is 75 years old, grew up in this area and has never heard these sounds. He has hunted in this area his whole life and is very familiar with the local wildlife.
Full Report here:
BFRO Report 49909: Family hears possible vocalizations late at night near Ponca City