I looked for a kingfisher in a local park some days ago but got only a few shots just before sunset.
R5m2 + RF 200-800 @ 1/4000s, f/9, ISO 51200
...
Two days later I had more luck and saw him in the morning but only once flying by in a distance.
R5m2 200-800
@ 1/4000s, f/9, ISO 12 600/ 20 000
...