Th European grey herons were considered a delicacy... some king served up about 400 in one feast to nobility present. Maybe he figured was protecting his trout supply in the process.
That skinny neck expands like a snake’s to accommodate rather large fish. They also eat mice, rats, snakes, and frogs.
Here’s one eating a very fat rat [after the initial glance at a family of Sandhill cranes ] :
https://youtu.be/94j77eDqef4
And another https://youtu.be/LdH6HA1QcJM
The fat rat might b a pocket gopher