Hawks, crows and eagles all strike during the day. I am pretty sure owls are only out at night.
We have the tall chicken wire around the run, I think it's 5'. My husband put 8' poles in the center of the run and draped the netting on top and then secured it to the wire with zip ties. My run in...
We have a fishing net. This will be our first winter, so I am not sure how it will hold up. The holes are larger so I am thinking snow build up wouldn't be such an issue.
Not sure about RIR's flying abilities but I can say before we had a covered run we lost 4 due to hawks. We put a cover on the run and haven't had a problem since.