It turns out that bird brains are a lot more complex than previously thought:

Birds are not stupid and their brains are not primitive so it is about time the scientific world gave them full credit, experts said on Monday.

An international group of avian experts took on the slow-moving world of scientific nomenclature, calling for a new map of the avian brain that reflects its true structure.

As they fly gracefully across the sky, it's hard to deny some sort of smarts are involved. Of course, when they crash headlong into a window, it's hard to overestimate it.

Then again, people walk into glass doors all the damned time. It would seem that nature did not wire any of us for large walls that can be seen through.