Amphibians are more vulnerable to extinction.  Why?

• The current mass extinction episode is most apparent in the amphibians. Because of their sensitivity and general dependence on both terrestrial and aquatic habitats they are often regarded as indicators of the health of the environment.
• Amphibians are of particular interest because their physiology and complex life cycle often exposes them to a wider range of environmental changes than other species must face.
• They have permeable skin, live on both land and water, their eggs have no shells.
• Some recent evidence points to ozone as a possible contributing factor to the worldwide decline of amphibians.
• A number of diseases have been related to mass die-offs or declines in populations of amphibians, including "red-leg" disease.

@ Revathi: Good Answer! Keep Posting!!