Winter is coming

I saw a bunch of geese yesterday. They were flying rather low. I was thinking, maybe they decide to fly south just about the time the trees went bare. Later on, I also saw quite a few of them chilling out in a little pond. The pond was really quite full of them geese.

So, why do they do that? Why not sleep in some bushes somewhere? I mean, it was just a little pond. It doesn't take much to just pounce them in the water like that.

I also saw quite a few dead deers on the side of the road. I wonder just how many generation does it take for the deer to evolve enough to learn crossing the street safely. And just how long does it take for people to learn to stop hitting these deer?