Brachypelma smithi ( Mexican Red knee) 
Appearance: Dark brown/black body with distinctive orange-red leg joints (knees) and tan carapace.
Size: Large, reaching about 5-6 inches leg span.
Temperament: Generally docile, calm, and slow-moving; prefers to flee or flick hairs before biting.
Venom: Potent enough for prey but mild to humans, causing pain similar to a bee or wasp sting. 
Habitat & Behavior
Origin: Central Pacific coast of Mexico in arid scrublands, dry forests, and deserts.
Lifestyle: Terrestrial ambush predators, living in burrows under rocks or vegetation.
Activity: Nocturnal hunters. 
Life Cycle & Diet
Lifespan: Females live 25-30 years; males typically 5-10 years, maturing much slower.
Reproduction: Females lay hundreds of eggs in silk sacs; males seek females in late summer/fall.
Diet: Carnivores eating insects, small frogs, lizards, and mice.