On Tue, 13 Oct 2015 09:46:27 -0400, songbird
wrote:

we usually have a few knock themselves against the
windows each year. maybe one dies. seems to be the
most active during spring mating season. we've moved
one birdbath further away from the house too which
also seems to have helped reduce the numbers. i think
a bit of netting hanging down from the eves in front
of the windows would work to give the birds a sign that
it really isn't a passage through...

way back when the house was being built i was here
when a pheasant was being chased by a hawk and it
flew into the patio door. that was quite a loud
bang at the time and it left an outline on the window
of dust shaped just like it. it lived...

Birds are known to eat fermented berries, makes them drunk and they
fly into objects like windows.

Have a photo somewhere, where a small owl flew into a sliding glass
door. Made a perfect print when it knocked the dust off it. You could
see details of the feather -- wings spread, etc.

I have hummingbirds fly into my garage when open. Hover around the red
rope and plastic knob -- thinking it is a flower. Happens often. Then
the fly out.