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Lycosidae
I see these wolf spiders all the time in Aquatic Park, Berkeley. They are approx, 1 cm long and are black/brown. I do not know the specific species name.
Thistle plant in Aquatic Park, Berkeley, CA.
Wolf spiders are members of the family Lycosidae, from the Ancient Greek word "λύκος" meaning "wolf". They are robust and agile hunters with good eyesight. They live mostly solitary lives and hunt alone. Some are opportunistic hunters pouncing upon prey as they find it or even chasing it over short distances. Some will wait for passing prey in or near the mouth of a burrow. Wikipedia