Ahhh.....animal related outages.
Snakes do us the most damage. They get in our substations and trip out the whole thing. A couple of years ago, the snake got up on the main transformer, and the resulting arc took out two low side bushings, two high side bushings, and an arrester. Total bill....$20,000!

One of my "favorites" was the snake that took out a distribution feeder one day. When we found it, it was still hanging in the stucture in such a way that it was virtually impossible to pull it out with causing another outage. So we left it until we could figure out what to do. The buzzard that flew in to get the snake (taking out the entire substation) figured it out for us!