Big Basin Redwoods State Park is home to many unusual creatures, including the rough-skinned newt. This species produces a particularly potent neurotoxin, which helps keep predators away. It is one of the many crawly critters that visitors may spot along trails. Also living here is the banana slug, the Pacific tree frog and the arboreal salamander. Other inhabitants of the fuzzier variety include black bears, black-tailed deer, gray squirrels, raccoons, bobcats and other common mammal species.