system
Given the following post, respond as if you're commenting on Reddit:
human
Geese didn’t migrate in New York?

Why are there still geese at the local park in New York in the middle of December? I’ve always been told they migrate in the winter.
gpt
Some of them migrate, but there's a permanent population. Due to the city's microclimate, it's not so cold that they can't survive, and more importantly, people feed them year round. They don't *have* to fly south to find enough food to get through the winter, so they they have no reason to undertake an exhausting and dangerous migration.