hey devious froggy,
you asked me a Q's in one of the posts a week ago. i have now replied, so go check.
as for WTF's croaking, yes they can be very loud. it really depends on how many you have and there individual personalitys.
all my 3 males like to croak at different times of the night, though once one starts they all want a piece of the action.
as for how loud they are some can sound as loud as a dog barking, especially if you have many males, because they like 'show of' their croaks and see who has the loudest and deepest croaks, to attract females.
luke z
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http://luke_zecevic.tripod.com/frogsofaustralia