What could be the

Amphibian decline is linked with the natural forces like competition, predation, reproduction, environmental contamination, alien species invasion and climate changes.

Due to permeable skin amphibians are more prone to diseases. Nowadays the major cause of the extinction of amphibian is climate change and a disease called chytridomycossis.

Moreover due to dual habitat i.e. land and water, amphibians are facing dual environmental changes.