Green Tree Frog

The Australian Green Tree Frog grows to about 10cm, and lives for around sixteen years. It has discs in its toes, that allow it to climb vertically up glass. While the frog does have lungs, it absorbs oxygen through its skin.
They are docile creatures, eating mostly insects and spiders, but they sometimes also eat other frogs, and even small mammals (docile, in a canabalistic sort of way).