Amphibians

Pacific Giant Salamander

Dicamptodon · also called coastal giant salamander, Pacific giant salamanders

Least Concern ↓ carnivore Temperate forest Rivers & wetlands Mountains

Most salamanders are small, silent, and easy to overlook. A Pacific giant salamander is none of those. It grows heavy enough to catch and eat mice, snakes, and other salamanders, it barks or yelps when you grab it — one of the very few salamanders with any voice at all — and many individuals never leave the cold streams they hatch in, keeping their gills for life.

Overview

Pacific giant salamanders are the genus Dicamptodon, four species in the cold, clear streams of moist coniferous forest in the Pacific Northwest, plus an isolated population in Idaho and Montana. At up to 35 cm and thickly built, they are among the largest salamanders that spend time on land, and they are powerful generalist predators, adding crayfish, fish, shrews, mice, and small snakes to the menu as they grow.

Voice, and two ways to live

Alarmed, the salamander arches its body, lashes its tail, oozes bitter skin slime, and barks or yelps — very unusual for a salamander. Many individuals are paedomorphic, keeping their gills and tail fin and staying aquatic for life, breeding without ever transforming; others metamorphose into stout, mottled, lung-breathing adults that roam the wet forest floor. Both are the same species.

Tied to clean water

The larvae need cold, clear, well-oxygenated water with a stony bottom and take one to several years to develop, so the species is sensitive to logging that warms and silts up streams, and it is used as an indicator of healthy forest headwaters.

Status

The four species are Least Concern but declining, still locally common where habitat is good. Logging, roads, dams, and development degrade the headwater streams the larvae need, and the Idaho giant salamander has a small, fragmented range.

Pacific Giant Salamander: common questions

How big does a Pacific giant salamander get, and is it really giant?

An adult reaches about 30 to 35 centimetres in total length, including the tail, and is heavily built with a broad head and thick limbs, making it one of the largest salamanders that lives partly on land. It is giant by the standards of typical woodland salamanders, which are often finger-sized, but modest next to the truly giant salamanders of China and Japan, which can exceed a metre and a half, and the American hellbender at up to 70 centimetres. So the name is relative. Within its range and lifestyle, a fully grown Pacific giant salamander is an impressively large and formidable animal.

Can Pacific giant salamanders really make sounds?

Yes, which is unusual. The overwhelming majority of salamander species are mute, lacking the vocal apparatus that frogs use, and communicate by scent and touch. Pacific giant salamanders are among a small handful of exceptions. When grabbed or badly startled, they can force air out to produce a low bark, a rattling croak, or a sharp yelp. It is not a mating call or a social signal as far as anyone can tell, but a defensive noise, part of a startle display that also includes raising the body, waving the tail, and secreting distasteful skin slime. Hearing one is memorable precisely because a salamander making a noise is so unexpected.

Why do some stay in the water with gills their whole lives?

This is called paedomorphosis or neoteny, retaining juvenile features into adulthood. A Pacific giant salamander larva can follow one of two paths. It may metamorphose, resorbing its gills and tail fin, developing lungs and eyelids, and moving onto the forest floor as a terrestrial adult. Or it may become sexually mature while keeping its gills, fin, and fully aquatic body, and live and breed entirely in the stream. Which path a larva takes depends on genetics and on conditions, with stable, productive, predator-free water favouring staying aquatic, and drying or crowded conditions favouring transformation. Both forms are the same species and can interbreed.

Are Pacific giant salamanders dangerous or venomous?

Not dangerous, but not entirely harmless to handle. They are not venomous, meaning they have no way to inject a toxin, but their skin secretes a sticky, bitter, mildly poisonous slime that deters predators and can irritate your eyes, nose, or mouth if you handle the animal and then touch your face, so washing your hands afterward is sensible. More notably, a large adult has a strong bite and sharp teeth and will use them in defence, and a determined bite can break the skin and draw blood. As with all amphibians, they also absorb chemicals through their skin, so any handling should be brief, with wet hands free of lotion, sunscreen, and insect repellent.

Sources & further reading

Written by HideShark Editorial Team · reviewed by HideShark Science Desk. Published September 10, 2026. Last updated September 10, 2026.

Quick facts

Scientific name: Dicamptodon
Diet: A powerful generalist predator that takes aquatic insect larvae, snails, and worms when small, and as it grows adds crayfish, fish, tadpoles, other salamanders, small snakes, shrews, mice, and even small birds, seized in strong jaws lined with sharp teeth
One of the largest land salamanders: At up to about 34 to 35 cm total length and a robust build, the Pacific giant salamanders are among the largest salamanders that spend time on land anywhere in the world, dwarfed only by the fully aquatic giant salamanders of Asia and the North American hellbender
A salamander with a voice: Most salamanders are silent, but Pacific giant salamanders can produce a low-pitched bark, rattle, or yelp when alarmed or seized, one of very few salamanders known to vocalise, using it as a startle defence
Many never leave the water: A large fraction of Pacific giant salamanders are paedomorphic, meaning they keep their external gills and tail fin and remain aquatic their whole lives, breeding without ever transforming, while others metamorphose into stout, mottled, lungs-breathing adults that roam the wet forest floor
They defend themselves with skin toxins and a bite: When threatened the salamander arches its body, lashes its tail, secretes a sticky noxious substance from glands in the skin, and will bite hard, and a large adult can draw blood from a handler
Tied to clean, cold, forested streams: The larvae need cool, clear, well-oxygenated water with a stony bottom and take one to several years to develop, so the species is sensitive to logging that warms streams and fills them with silt, and it is used as an indicator of healthy forest headwaters
Four closely similar species: What was once a single species is now split into the coastal giant salamander, the California giant salamander, Cope's giant salamander, and the Idaho giant salamander, the last isolated in the Rocky Mountains far east of the others, a relic of a once-continuous range
Range: The Pacific Northwest of North America, from extreme southwestern British Columbia south through western Washington and Oregon to northern California along the coast ranges and Cascades, plus a disjunct population of the Idaho giant salamander in the mountains of northern Idaho and adjacent Montana, in and along cold, clear streams, seeps, and mountain lakes within moist coniferous forest, from sea level to around 2000 m.
Conservation status: Least Concern ↓ ≈ The four species are currently assessed as Least Concern because they remain locally common in suitable habitat across the Pacific Northwest, but the overall trend is considered to be declining, with logging, road building, dams, and development degrading the cold, clean, sediment-free headwater streams the larvae require, and the Idaho giant salamander in particular has a small and fragmented range, so the group is secure for now but dependent on the condition of forested watersheds in the wild