We see snakes here on the farm quite a bit in the spring/summer. A couple years ago we had a rat snake get up in the rafters to get after some birds nesting in the eaves. No more chirping after the snake visit!
The other snakes I’ve seen are black racers and king snakes. My wife wants to kill 'em all, but I tell her to leave them be, they keep down the rodents. No poisonous sightings yet, but my bro-in-law killed a 36" timber rattler last year. 