Cutaneous respiration
The skin of amphibians is a major site of respiration in all species for which measurements are available. Cutaneous respiration is the sole respiratory mode of lungless salamanders (family Plethodontidae) which lack lungs entirely yet constitute the largest family of salamanders. Cutaneous respiration in frogs and other amphibians may be the primary respiratory mode during colder temperatures.
Trilling frog
The Trilling frog is adapted to desert conditions and can spend years without having to surface, buried deep underground with their glands under the skin full of water.
The Trilling Frogs will commonly dig themselves to the surface at the beginning of the late summer rains. There are stories that to prevent death by thirst, Indigenous Australians could catch these frogs by cleverly stamping on the right patch of ground to simulate thunder or falling rain, causing the frogs to surface where they could then be made to give up their stored moisture.
These frogs will spend a few weeks calling nightly while floating in or sitting at the edge of rainwater filled claypans, puddles and waterholes. 
DEH, Trilling Frog Call