Alaska is the northwestern most part of North America. Reptiles and amphibians are not common in Alaska due to them being cold-blooded. Alaska has four reptile species and eight amphibian species. Two of these species are introduced. There are no snakes or lizards in Alaska.
Reptiles.
Order: Testudines - turtles and tortoises
Family: Cheloniidae - typical sea turtles
Family: Dermochelyidae - leatherback sea turtles
Amphibians.
Order: Anura - frogs and toads
Family: Bufonidae - true toads
Family: Hylidae - tree frogs
Family: Ranidae - true frogs
Order: Caudata - newts and salamanders
Family: Ambystomatidae - mole salamanders
Family: Salamandridae - newts
Unconfirmed species.
Two species are alleged to occur naturally in Alaska, but are not officially confirmed.
Additionally, the tailed frog, "Ascaphus truei", occurs in British Columbia until the Portland Inlet, and may occur in southernmost Alaska.