Furry little investigator

I was listening to the youth speaker during sacrament meeting at my church two Sundays ago when I first noticed it. Above and behind Maddie, and a little to the right, was a dark mass hanging from the bricks of the front of the chapel. After the meeting closed, I went to investigate, surprised to see that no one else had noticed.

My initial suspicions were correct. We had a visitor that hadn't been welcomed.