Frog Pond

About 4,000 species of frogs and toads are known to scientists, and another ten to twenty species are discovered each year. Because of their acute sensitivity to changes in the environment, such as deforestation, ozone depletion, global warming, and air and water pollution, these amphibians are disappearing faster than most other wildlife.
Many frog species become extinct before scientists ever have a chance to learn of their existence. Others are vanishing before our very eyes. Global frog declines are a sad indicator of a decline in the planet's general health.