Aphonopelma eutylenum(the California Ebony)

Aphonopelma eutylenum, commonly known as the California Ebony or Goldhead Tarantula, is a docile, burrowing tarantula native to the southwestern United States, particularly California. It's known for its dark coloration, especially in mature males, and is popular in the pet trade due to its manageable size (up to 5-inch legspan) and generally calm demeanor, though it can flick irritating hairs or bite if provoked. 

Key Characteristics

Appearance: Varies from light beige to dark brown/ebony; males become very dark as they mature. 

Size: Females can reach a 5-inch legspan; males are slightly smaller. 

Habitat: Found in grasslands, chaparral, and coastal sage scrub in the US and Mexico. 

Behavior: A fossorial (burrowing) spider that hunts at night, waiting near its burrow for prey. 

Temperament: Generally docile but will bite if threatened; bites are painful but not medically significant. 

Defense: Can flick urticating (irritating) hairs from its abdomen as a defense mechMyanism.