Up to 5 centimetres long with cups on the tips of its fingers, the colouring of the European tree frog varies depending on the environment, temperature and humidity. It can be greyish brown or bright green.
The tree frog lives among deciduous trees and shrubs and can be found in central and southern Europe.
As its name suggests, this frog climbs trees extremely well. It spends the winter under stones, trees and foliage. During the breeding season, the call of the male can be heard over a kilometre away. It is active mainly during the night and feeds on small invertebrates.