Baby Barred Owl
Love it, this thread constantly inspires!
70d with Sigma 50-150mm OS:
I am curious, are you using standard C.Fn II Autofocus settings or have you gone more aggressive when using this particular lens? I keep tweaking the Sensitivity, Accel/decel, and the image priorities but can never find a happy medium - but I also am not doing any BIF either since my children are way too erratic to use them as my test subjects lol.