This happens more often than you would think...I remember someone on this forum posting a couple of years ago about how they had their female Cockatiel outside with them while they were gardening on a beautiful, sunny day. They had their Cockatiel's cage outside in the middle of the garden, and they thought it was okay to let the Cockatiel out because she was clipped, I guess this was something she did often and the Cockatiel never flew away, she just sat on top of her cage and enjoyed the sun...Well one day her Cockatiel was sunning itself on top of it's cage in the middle of the garden, while she was planting things, and suddenly a Hawk swooped down, grabbed her Cockatiel in it's talons, and she watched helplessly as her Cockatiel was carried off into a tree, only to hear the horrors of her being eaten alive by the Hawk...I can't even imagine...
I have a huge bay-window in the front living-room of my house that overlooks my front yard and the street. My couch is pushed right against the wall below the window, so that the top of the back of my couch is level with the large window=sill, and all of the birds and my Bearded Dragon especially just love to sit on either the back of the couch or the window sill and just look out over the front yard, watching people walking and driving up and down the street...My Bearded Dragon has a little pillow on the window sill that she lays on for hours at a time, just fascinated by everything going on outside.
One day I was laying on the couch watching TV, and I fell asleep...I realized that Kane had flown over to the back of the couch and was just sitting looking out the window while I napped below him...I was drifting off to sleep, happily and relaxed, when Kane let out a noise that was something I'd not heard before or since, it was so bizarre, but it was definitely not a good noise, lol...Then I felt him land on my upper arm and then jump down onto my face, literally had his Senegal-butt right on my nose...I opened my eyes up and started to say "Kane, what the hell are you. do....WHOA!!! HOLY S**T!!!", among a lot of other words I won't repeat...The largest Barred-Owl in the world had flown-down from the big tree in my front yard and was almost hovering right directly in from of the bay window, with it's wings fully-opened...IT WAS MASSIVE!!! AND IT WANTED TO EAT KANE!!!
I didn't realize how large those Owls are, especially when their wings are opened-up the entire way...I mean, he was just "there" all of a sudden, and then as soon as I sat-up he took-off into the tree again...This was in the middle of the afternoon in broad-daylight, so you know the only reason an Owl comes out during that time of day is because they've spotted a tasty-treat!!! Kane looked traumatized, and it's not like you can explain to your Senegal Parrot that the Owl can't get through the glass....I will never forget that, that Owl was just HUGE!