What's endangering amphibians?

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

LA Zoo, Aquarium of Pacific help release critically endangered

IUCN Red List: Amphibians in Danger

All about Amphibians

IUCN Red List: Amphibians in Danger

Amphibian crisis: 41% of species deemed threatened with extinction

Peruvian Harlequin Toad

Are Amphibians Endangered? The Species Loss Under Our Noses

Endangered Northern Leopard Froglets are growing at the Oregon Zoo

Please don't croak: Biologists aim to save critically endangered

Saving the frogs from existential threats