Noisy before rain: The European tree frogs (for instance Hyla arborea) are common in the middle and south of the continent, and range into Asia and the north of Africa. The species become very noisy on the approach of rain, and are sometimes kept in confinement as a kind of barometer.
Evenings in North America: In North America there are many species of tree frog, including Hyla versicolor, a species of grey treefrog, and Hyla cinerea, the green tree frog. The spring peeper is also widespread in the eastern United States and commonly heard on summer and spring evenings.
The tree toad is a popular name for several of the Hylidae. Hyla versicolor is the changeable tree toad, Trachycephalus lichenatus is the lichened, and T. marmoratus the marbled tree toad.
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