Advice on Passive bird monitoring

Hi,

I am just wondering if anyone has seen plans for a monitoring device for birds (or similar). The idea is it plays a bird call then records for 10 second once the call finish to see if there is a response from a bird of the same species.

Thanks

Adafruit has some examples for their VS1053 board. See Overview | Adafruit VS1053 MP3/AAC/Ogg/MIDI/WAV Codec Breakout Tutorial | Adafruit Learning System