What's endangering amphibians?

Why are frogs so endangered? Why should I care if amphibians are endangered? What amphibians are endangered in Washington state? 

Scientists survey medicinal potential of endangered frog family

Amphibians facing 'terrifying' rate of extinction

Endangered Amphibians In The Cloud Forests Of Alta Verapaz

Using Algorithms To Catch The Sounds Of Endangered Frogs : All

Frogs suffer 'mass extinction' from fungus disease: Science

Amphibian crisis: 41% of species deemed threatened with extinction

Endangered Species International

Amphibians Defenders of Wildlife

IUCN Red List: Amphibians in Danger