Tried it on video, was still hard to hear, but my guess would be bears.
Probably talking smack to each other over some berry bush.
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Bears will threaten each other when they get to close, never really coming to a fight, but a lot of posturing.
This sometimes is an open mouth growl...
They almost look like they're gonna angry kiss.
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Don't know much about cougar vocals, but usually higher pitched from the little I have heard.
And I have seen them mating at NW Trek, so know what that sounds like.
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But then, I am only guessing...