Cats fighting. Nothing sounds creepier at night outside your window.

[Locut0s]

The closest sound to something truly alien or demonic.

[TreasonousBastard]

1. Of course, because...

it is both truly alien and demonic.

Unless it was cat sex, which is even more frightening.

[uriel1972]

2. Deep breathing?... nt

[Demo_Chris]

3. Gunfire gets my vote. nt

[Locut0s]

5. Ok you have me there. I don't think I've ever heard a real gun go off...

Now that I think of it I don't think I've ever heard a real gun go off outside movies and TV.

[FatBuddy]

4. that ain't fighting

they are trying to get their fuck on

[UncleYoder]

6. But for the truely

make your hair stand up moment, try having a flock of peafowl go off.
You would swear you are in a slasher movie

[uriel1972]

7. There is a seabird, nicknamed the "Devil-bird"

I read about. It's in the UK I think, a shearwater from memory. Scares the living daylights out of campers at night because it sounds like a demon screaming in demonic(?). Freaky shit.

[The Velveteen Ocelot]

8. Loons.

At night, out in the woods, you're all by yourself in some remote cabin....

[Demoiselle]

10. I love that sound. Of course, if I didn't know what it was, I'd freak out.

[The Velveteen Ocelot]

11. Years ago I went camping in northern Minnesota

with a bunch of friends, one of whom was from Kansas. After it got dark the loons started up and the guy from Kansas nearly jumped out of his skin, yelled "What the hell was that??" The rest of us LOLd.

[magical thyme]

9. fisher cats, and my cockatoo

Fisher cats have the most ungodly screech on earth....gaaaah!

And every few years or so my cockatoo has a bad dream or something and lets out a shriek in the middle of the night. Cockatoo voices are designed for long-distance communication and when they let it out full blast, can be heard a mile away. I figure the neighbors must think somebody is being tortured in my home. And they're right. Me.

[Arugula Latte]

12. But dogs barking incessantly are more annoying

because it goes on and on and on ...

I feel like going Elaine Benes on them when I hear that.