My kingfisher squeaks at me all the time.. As soon as I show up he will fly around squawking until he eventually flies off.
The other day two green herons were working the shore lines. I got out the binoculars. They eat a lot more than the kingfisher does. All FHM, but they get quite a few..
As soon as I saw their success rate, they decided to move on..

9 yr old pond, 1 ac, 15' deep.
RES, YP, GS, FHM (no longer), HBG (going away), SMB, and HSB (only one seen in 5 yrs) Restocked HSB (2020) Have seen one of these.
I think that's about all I should put in my little pond.
Otter attack in 2023