I heard Baron barking on the other side of the pond one day. Just standing there and barking.
This was the object of his fixation vexation.
It was a face off.
They stayed like this for about 10 minutes; Baron sending over a menacing bark every few moments while the egret just glared at him, not flinching. Finally Baron meandered off in the opposite direction, never running around to get closer to the egret.
Perhaps he was smart enough to know the egret would just fly off if he approached and he didn't want to waste his energy.
Or maybe he was just feeling a bit unbrave (we won't say "chicken.")