Mystery Bird

["John Hartog" hartogj]

At first I thought it was an owl since it began calling as the
darkness set in. It lasted about 25 minutes, and for a few minutes of
that there was another distant one answering. The same call resumed
for 30 seconds at first light. Here is that dawn segment =96 recorded
with NT1As > pb224 > rh10; recorded at full gain; Altrac3-plus;
converted to 16/44.1, low-pass filtered, and compressed to 192k mp3.

http://www.rockscallop.org/ear/jh-060625-0410_mystery.mp3

Does anyone recognize this call?
After pondering this a while, I think it sounds like a quail.

For the Google Earth experience paste in: 44 02.858' N, 120 15.142' W
The mics were facing N.

John Hartog