These Southern Leopard Frogs were calling from a flooded grassy pond on a cool fall day. This is the southwestern edge of their range.
The call consists of two parts. The first part is sort of a chuckling call:
Here is the spectrogram for that part of the call:
The second part of the call is more of a typical frog "croak":
And here's the spetrogram for that part of the call:
© Chris Harrison 2012