Amphibians were dominant on the landscape during carboniferous period, and ever proliferating. The carboniferous period is often referred to as the age of amphibians. The climate was warm and steamy with little or no ice at the poles. There were extensive wetland environment, which allowed for amphibian niche diversification.

Adaptations of amphibians:

• Water-tight skin
• Internal fertilisation
• Direct-developing embryo
• water-tight egg

Central American Biodiversity: Conservation, Ecology, and a Sustainable Future, edited by Falk Huettmann, Page no: 276, 277.