Twenty different species of reptiles (which include lizards) and amphibians (which include salamanders) can be found at the Andrews Forest. The rough-skinned newt (Taricha granulosa) is so commonplace at the Forest that it has taken on the role of mascot, appearing in the Andrews Forest logo.  

The Coastal Giant Salamander (Dicamptodon tenebrosus), fondly nicknamed Dicamp by researchers, can reach up to 12 inches (30 cm) long. The Dicamp is subject of an ongoing study, 35+ years running, that tracks the size and locations of salamanders and trout in a stream reach of Mack Creek at the HJA. Researchers have found that the average size of adult trout has gotten smaller over the decades-long study, while salamanders in the same stream reach are not changing in size, indicating that salamanders may be more resilient to changes over time.