James Silverton wrote:
> For several mornings I have woken up to thumping noises at about
> 6:30
> AM. By the time I got really awake and found a bathrobe to look
> outside, the noises had stopped. This morning, I happened to look up
> and saw a mocking bird flying at speed up against the clerestory
> windows of my bedroom. He did this about 20 times before stopping.
>
> I guess at that time in the morning the light is such that the
> windows
> act as mirrors. The bird is probably trying to drive off a rival but
> it takes him 20 or more thumps to get the point or perhaps knock
> himself even stupider.....BIRD BRAIN!

Yes, we had a low IQ male cardinal who used to do the same thing -
attacking his rival in the window, morning after morning.