I wondered if anybody could help me identify the animal producing the sound that I just about managed to record with my phone (it was extremely quiet, so I apologize for the low quality of the recording). Said animal (presumably a bird, but maybe a feline?) appeared to be communicating with an owl which can also be heard.
We heard this sound in Cleveland National Forest on top of mt Laguna near San Diego, California. The time was around 23:00 in mid-December.