A note: a lot of the “oddities” given identifiers by ENIGMA actually have logical explanations. Many of them are radars, or a listener simply misunderstanding what they’re hearing. Even so, for logging purposes the identifiers remain in use. Because a lot are hard to track down, there is no activity indication. If you hear any of these or have information/recordings please contact us.

Birdsong

The Russian Woodpecker/Kiev Woodpecker          The Twenty Minute Idler/The Blank Carrier

Yosemite Sam          X06 “Mazielka”          X21 “21 Note Melody”

XBS “Buzzsaw”          XC “Crackle”          X D “Fast ICW Dots”

XE “Echo”          XF “Faders”          XFR “Croaking Frog”

XJT “The Jet”          XM “Whales/Backwards Music Station”

XQ “Mew”          XS “Saw/Whine”          XSL “Japanese Slot Machine”

XTB “1 Tone 2 Buzzes”          XT2 “Pip 2”          XUP “The Pulser”

XW “Workshop”          XWP “Wop Wop”