Profiling, it’s a posture typically done to make the animal appear larger than the are. Many species do this. Alligators are known for this aggressive behavior.
Great Blue Herons are another that use the trick often.
Above is the start of a Heron begin a profile. He is not rigid, or throwing his head up yet. However the tense position shows he is up to something.
He was also walking towards open water…with a purpose.
Above is getting to a true profile. Marching along head up high. It’s a challenge move.
And here is the reason why. Another Great Blue is in space our friend considers his. Territory and impressing a mate are the main reasons for profiling. Above the other Heron is looking away which can calm the situation.
It’s rare for two Herons to actually fight, noise and flapping wings is considered a fight. Herons and Egrets, that is different. And not pretty.