Not only learn but some snakes can Identify between humans. Ask my wife and the Retic that took a stab at her. Long story short it was my retic and visitors wanted to see him. When being handled I saw signs of stress heavy breathing and flightyness so I put him up. Five min later I heard my wife say "ouch he bit me!" I went straight to the cage and picked him up and he chilled out right then and there.