If they're in Yosemite, the might be at Whitney next. Article on
Mother Nature Network. They live back in sheltered granite "caves" (crevices) and are sort of a cross between spiders and scorpions, but with the venom in their claws, not fangs (like spiders) or tails (like scorpions).
Ok, they're only a half-inch long and harmless to humans but it'll make a great campfire story.
