Trying out the R6 with 100-400l II and 1.4X III, but the only BIF today was the northern migration at higher altitudes. The locals were settled in on the pond so I did get some portraits.
One large bird did approach, just kidding. I post it because the R6 surprised me a bit. After drawing the focus around the entire "bird", the EyeAF kicked in and settled on the cockpit window. Which makes sense, I guess.