Mystery Frog Calls

[Thylacine]

Hi folks, I actually posted this query on another site but have not had any response so apologies if you have seen it twice. I have a couple of mystery frog calls in my backyard pond. I'm hoping someone may be able to suggest an ID. These are in north-west Tasmania, Australia. Hopefully there are some Australians on this site that may recognise them.

I have recorded one call it and put it on dropbox. Here's the link:

https://www.dropbox.com/s/zcjlj2ouyk...0frog.mp3?dl=0

I was up at our pond the other night and there were at least 7 Pobblebonks/Banjo Frogs ( Limnodynastes dumerili ) and around 30 Southern Brown Tree Frogs ( Litoria ewingi ). Many of the frogs were mating. The above call doesn't sound anything like Southern Brown Tree frog or Pobblebonk to my untrained ears. I thought maybe a variation of Eastern Common Froglet ( Crinia signifera ).

Also, in the video linked below there is another mystery call at the 15 second mark. Maybe Growling Grass Frog (Litoria raniformis)

...and are the two frogs at about 32 seconds actually Southern Brown Tree frogs or something different. Maybe they are one of the culprits.

Link to video:
https://youtu.be/p_ClyeP1oBs


Thanks for any help you can offer.

Alan