The Pacific Northwest has large expanses of wet forests where several species, genera and families evolved and are now restricted geographically. Overall, there are few shared species of amphibians in the West and the East. Eastern species that enter parts of the West include the tiger salamander, Woodhouse's toad and painted turtle. However, the West's herpetofauna is distinct from the East. Some methods proposed elsewhere do not work in the West.
Exceptions are spadefoot toads in the arid southwest and Pacific treefrogs.
The later species is widespread and ubiquitous. State agencies play a major role in managing wildlife and have their own laws and guidelines to list animals as sensitive, protected or endangered species. Also, State Forestry Practices Acts and other regulations can greatly effect amphibian populations. Industry biologists and conservation groups add vital support to protection and management of resident herpetofauna. Volunteer programs on amphibians in the West seem minor or less effective than elsewhere in North America.