When hair trigger reflexes matter.
How many times has this played out over millions of years. Crocs go way, way back to the time of the dinosaurs.
Our ancestors knew this scene all too well. I remember Don Thomas writing about hunting a 10 foot wide African waterhole and being warned about the giant croc in it. He couldn’t believe a puddle that size held danger that big. He was wrong.
Note the birds. Oxpeckers, maybe?