We went to KFC for the first time in ages the other day. They have automatic doors that use a sensor at the top, I'm sure you've see them. Apparently, sparrows are smart enough to figure out how they work!
Yes, for the second time, Hubby and I witnessed a lone sparrow open the door and fly in to help himself (or herself) to the leftovers sitting on the table and the crumbs on the floor. After eating a bit, the bird flew to the door, tripped the sensor and flew out again. Twice.
I was impressed between giggles.