Very homley but unlikely sound. A rooster crowing on Mars.
6 seconds sound clip from the X Minus 1 - Mars is Heaven by Ray Bradbury classic radio dramaseries.
You can hear this line at 00:09:52 in the radio play.
Quote context
[...]
- Quiet isn't it. Not even a wind.
- Can't see anything through this ground mist.
- Quiet. You don't now what's out here. All right come on.
- What the...? Captain I could swear that, that sounds like a rooster.
- Very homley but unlikely sound. A rooster crowing on Mars.
- Kingston. Set that machine gun twenty-five yards to the flank.
- We'll stay here till the ground mist lifts.
- What do you make of the ground, Horst?
- Grass, plain grass. You can see some large foliage there where the mist's thinned down.
[...]