R5 EF 500mm F:4.0 Mk II + 1.4 EF T/C MK III ISO 800 F:5.6 @1/1600 8:1 crop from larger image
Eye AF was able to pick focus on the bird's eye at 150 feet despite vegetation in front of the eye.
Prior to Eye AF Using AF in this setting would previously have been unthinkable