This Great Blue Heron was very patient and didn't fly away when I set up my tripod and tried to manually focus in the failing light at 7:30 PM yesterday. I used my longest lens at 600mm with a 2x teleconverter. I also used the 2 second shutter delay to minimize shaking. This is not the sharpest or best lit of this series, but I chose it because you can also see there are two ducks near the heron's feet.