Last Friday at dusk, while in the right side queue for Matterhorn, a duck landed on the Monorail Beam causing the driver to stop and wait for him to move. It sat there for a few minutes while the driver continued to blow the horn, but the duck was unimpressed and did not move until a few guests started tossing bits of food at him.
My avatar is a photo of the Monorail vs, Duck incident (sorry, but it appears I can not upload pics direct from my computer, so that is the best I can do).
So, the question is, does that happen often? It was quite entertaining to those of us that happened to be nearby. It was a first for me, but I only get to Disneyland once a year if I am lucky.