The body of the California ebony tarantula comes in various browntones, ranging from light beige to dark brown and ebony colors. Adult females can reach a legspan of up to 13cm and live to about 25 yearsof age. Males reach maturity after 8–12 years and leaves their burrows after that in search of a mate. After spending all their energy on finding a suitable partner, they will die of exhaustion about 6 months after reaching adulthood.