I live in the Oakland hills so our living room is at the height where birds fly.
Over the last 5 years I've realized that there are a pair of crows which essentially own the airspace above our house and in front of it.
Each time a hawk or owl or crane flies into this airspace, it will be hounded by these 2 crows. And it happens pretty often.
(One of the crows only has 1 leg - that's why I know its the same 2 each time. We've named him Blackbeard.)
I imagine there is so much of nature we just blindly miss.