Night vision: mystery sound

Yes, the chirp of a mating Tweetdeck is clear on this, but the other sound? Frogs?

Can anyone tell me?

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3 thoughts on “Night vision: mystery sound

  1. If only I did my ecology classes at Uni of Adelaide. They have all the frog experts!

    Mind you, if I had a taxanomic key, a specimen and possibly a scalpel, I’d be able to identify the culprit. Probably going a bit far though.

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