Rooster found a tarantula like this one by the chicken coop. I'll bet he was very sorry to have found his way there: Roo can be a pill when there is an intruder like a lizard, snake or one of these guys. They smell funny. And that's how we know they're something to alert mom about.
Mom picked the Big Hairy Spider up with a rake and walked it outside of the yard. Last we saw of him, he was heading to the creek bed.