The frogs have been mostly quiet since Christmas, when it started drying out. The dam has had water and has had plenty of tadpole action going on in it but not so much calling. The pond water has been quite clear. I switched the water off when it was raining and only remembered to turn it on a week or so ago when it started looking very shallow.
The increased water level didn't trigger frog calling straight away (it was relatively hot) but the remnants of a cyclone are now heading towards us together with low pressure and the frogs in the pond (all spotted marsh frogs) have become very vocal. The frogs in the dam have been quiet - perhaps because the water level has continued to fall.