Greetings,
As if I needed a new challenge 
Please note I did not have the light for these shots, just looking to see if it was possible.
Tripod, Manual focus to a point just in front of the feeder, speed as high as possible.
I tried single and burst mode with and without remote shutter release and what it seems to boil down to is timing.
The chickadee's stage in the bush across from the feeder and there is one particular branch on one tree that yields a fairly consistent flight path.
The "trick" is setting the focus and timing the shutter release so the bird is in the dof 
Strong back light...
On these next two shots it was totally overcast and could have benefited from +Exp Comp, sigh..
Cheers, Don
&n