RFID

["el_supremo01" el_supremo01]

Recorded in my backyard early this afternoon in Saskatoon, SK, Canada.
http://members.shaw.ca/el_supremo/001-01_q.wav     (95kB)
Is this a Blue Jay (there were a couple of Blue Jays in the area)? It
only made this one sound, separated by silences of up to about 2
minutes. I tried to filter out extraneous noises, including our attic fan.
I never did see what was making this noise but all the sparrows,
finches etc. that were at the feeders disappeared until this thing had
gone.

Thanks
Pete