When I saw this immature Olive-backed Sunbird foraging at a flowering vine along Bued River, I tried to get close openly, on foot.
I couldn't get nearer than 10 meters, as that seemed to be its comfort distance before it got frightened and flew away. I had to
use my vehicle as a blind to get closer. It worked.... the bird acted as if I wasn't there at all, and 560 mm was long enough to fill the frame.

The 7D II's excellent AI servo AF allowed pinpoint focus placement on the active forager, while the light and compact 400 DO II + 1.4x TC III
made shooting from the tight confines of the driver's seat very convenient. This bird is only 114 mm long from tip of bill to tip of tail,
but the 400 DO II's MFD of 3.3 meters is good enough to get full frame captures.