Monkeys on the Roof

Ok, so we don't have monkeys on the roof. I wish we did... that would be fun! It just sounds like we do. There are huge crows in this area and whenever they land on the roof (which is frequently), it sounds like monkeys are running all over. Our roof is metal so we hear every time they land. Then they scamper around. It drives poor Nala bonkers. She runs from room to room tracking their movements, barking. Do crows fly south for winter? I sure hope they do. If not, perhaps we'll need to get a BB gun! (Just kidding!)