It's Frog Week for a water-holding frog.By midday, keeper Gavin Jago has been sweating it out for hours inside the warm and humid reptile house, amid frogs, snakes, lizards and turtles. He's been busy preparing for Frog Week, including a special display o

It's Frog Week for a water-holding frog.By midday, keeper Gavin Jago has been sweating it out for hours inside the warm and humid reptile house, amid frogs, snakes, lizards and turtles. He's been busy preparing for Frog Week, including a special display on frog conservation, but says he feels as though he's being paid to carry out his hobby."Frogs are good environmental indicators" says Jago, whose passion for his sometimes venomous charges stems from childhood bush forays in Sydney. Some frog populations are declining worldwide, for reasons that are not well understood. November 01, 1993. (Photo by Kenneth Stevens/Fairfax Media via Getty Images).