I was driving around to find a parking spot at my apartment during my lunch break, and had to stop for a family of geese. However, the goslings in that family have grown to the point that they have the adult feathers. They still look weird, though, because they still have the lighter colored feathers on their face. They’re a smaller version of their parents, for the most part.
So since geese take their sweet old time to cross in front of people, I was very careful steering my car. One of the adult geese looked at my car and hissed at it. I said out loud “Oh yeah, hiss at my car, that’s a good idea.”
I parked and, as I walked toward the door to my building, I noticed that the young geese had already been taught how to hiss. Their beaks were open – didn’t hear them hiss, but that’s what they were doing.