In New Zealand we have four species of native frogs (Hamilton's Frog, Maud Island Frog, Archey's Frog, Hochstetter’s Frog) and three species of introduced frogs (Green and Golden Bell Frog, Southern Bell Frog, Brown Tree Frog). In the upper North Island, where I live, the main frog we see is the introduced Green and Golden Bell Frog.
The green and golden bell frog was introduced to Auckland from Sydney in the 1860s. The brownish eardrum (Tympanum) shows clearly, just behind the eye. The female grows to 9 centimetres, and the smaller male to 6 centimetres. It lays thousands of eggs on water, and these hatch as small black tadpoles. With suckers on its toes, it can climb even smooth surfaces like glass. Its call can be heard in summer, in areas north of Gisborne, near water on farmland and along bush edges.