Amphibians
Van Dyke's Salamander
Plethodon vandykei · also called Van Dyke's salamanders
In the spray of a small waterfall on Washington’s Olympic Peninsula, a Van Dyke’s salamander shelters among wet rocks, occupying a narrow strip of coastal mountain forest cool and moist enough to meet requirements few other habitats nearby could satisfy.
Overview
Van Dyke’s salamander, Plethodon vandykei, is a lungless salamander confined to a limited range of coastal mountain forest in western Washington state. Its close ties to cold mountain streams and waterfall splash zones make it one of the more habitat-specific salamanders of the Pacific Northwest.
A salamander tied to a very specific microclimate
Beyond simply needing forest and water nearby, Van Dyke’s salamander requires a particular combination of cold temperature and constant moisture that only certain stream-adjacent sites can reliably provide, narrowing its suitable habitat considerably.
Status
Near Threatened — a limited range and dependence on specific cool, moist forest conditions leave the species with little buffer against disturbance.
Van Dyke's Salamander: common questions
Where exactly does Van Dyke's salamander live?
Van Dyke's salamander is known from a comparatively limited range concentrated in the Olympic Peninsula and nearby areas of western Washington state, closely associated with cold mountain streams, seepages, and waterfall splash zones that provide the consistently cool, moist conditions the species requires.
Does Van Dyke's salamander have an aquatic larval stage?
No, like other members of its genus, Van Dyke's salamander undergoes direct development with no free-living aquatic larval stage at all, hatching directly into a miniature terrestrial form rather than passing through a swimming, gilled larval phase in a stream.
Why can logging affect Van Dyke's salamander even without destroying its stream?
Because Van Dyke's salamander depends on consistently cool, moist microclimate conditions near mountain streams, logging or other forest disturbance nearby can dry out and warm the immediate surroundings enough to make the habitat unsuitable, even when the physical stream channel itself remains undisturbed.
Is Van Dyke's salamander considered at risk?
Yes, Van Dyke's salamander is classified as Near Threatened, reflecting its comparatively limited range and its dependence on specific cold, moist stream-adjacent forest conditions that leave it with less buffer against habitat disturbance than more widely distributed salamander species.