Tree frogs, peepers, and green frogs by Laura Sebastianelli published on 2013-05-31T03:14:25Z tree frogs have been getting very vocal lately. here they are over the peepers, and some geen frogs. recorded May 29, 2013 around 10pm with a fostex fr-2, sennheiser me-66. edited in audacity. spectrogram created in Raven Pro.