Great-Horned Owl Fledgling leaving the nest

Shot yesterday morning. Me and my friend were watching this fledgling for a few hours to see if it leave the nest. Other sibling
left the nest day before.
This one was snoozing in and out and finally decided "Time to go"
Few preflight checks with the wings and then started to climb up and little hops to the edge of the branch. Stayed there for a while.
It was windy and we expected the fledgling be blown out and loosing balance. But it just hold on. I had to leave, but when I came back afternoon, it was gone.

I didn't crop much to show more of the habitat.
1D4, EF300mm f/2.8L USM NON-IS + 2.0X TC II (600mm f/5.6)
1/640, ISO-640, f/10 on the tripod.

Please click on the image for uncompressed image view, thank you.