My parents old house in Scottsdale had a window that was about 10 feet tall and 30 feet wide (guessing, it was probably much smaller lol) and we used to have birds fly into that all the time. Made a VERY loud noise, sounded like a golfer sliced a ball into the side of the house, and I'd always be the one who had to grab a shovel and flip it over the fence into the desert between our property and the golf course. It was pretty nasty having to clean blood/brains/whatever off the window.
Never seen an owl or hawk or anything big fly into a window though.
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