21 July 2012
Recorder Catch
0512 XM-like noises
0516 The noise changed to the slowed-down bird call noise
0518 Another variant, possibly a bird call slowed to different rate(s)?
0519 The classic slowed-down bird call noise
0537 stopped
Recording is available if you have nothing better to do. Unless there is some startling change in the noises, no further reports on this from me.