My son and I have been involved for many years with the conservation of frogs and tadpoles here in South Australia. We are members of the Frog and Tadpole Study Group (FATS) (ha ha, I know what you're saying) and every year take part in the Frog Census in which data is gathered for research.
http://www.epa.sa.gov.au/frogcensus/
I can immitate around 6 to 7 species, and pick out even more from tapings we do in swamps in winter in the dead of night.
The things we do for our kids.
When Rick was younger he used to breed frogs to release in the wild in areas that were losing their populations. At one stage he had 12 large aquariums in his bedroom full of frogs and taddys.
Now that he's grown up I am left with a few frogs in our pond out the back.