20 s of calling song, 4 caged males from Livingston Co., Mich, 16.3°C (WTL194-10b) [cages close, songs synchronized]

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith