QUOTE(Bitter Monk @ Sep 16 2008, 10:20 PM)

Coyote.
I agree, it sounds like coyote. At approximately the 6-8, 15-17, and 20-22 second marks you can hear two voices, i.e., more than one coyote. Also some parts have a “howl” quality to it. The source animals must be in a canyon, or against a cliff wall to give such a pronounced echo.
Although I will say there
is an odd timbre mixed in, especially after 40 seconds. And personally I’ve never heard coyotes howl like this during the day.
We have coyotes near my house and during the summer and fall nights they sometimes howl like this and it is definitely a creepy thing to hear in the middle of the night. Usually they howl together with a coyote chorus of many voices (maybe the whole pack?). Ironically last night I heard two lone coyotes “talking”, one came from north of my house and another answered from the south.