Global warming?

There was a time when, when fall came, everything died off or went into hibernation, and for about a half year, nothing grew or bloomed or buzzed or flitted. However, as those older and wiser like to remind us, nothing ever stays the same. I’m sure they aren’t referring to global warming, but how else do you explain a live housefly sitting on the outside of my office window, cozy underneath the outside blind – at 60 degrees north latitude on January F-ing twenty-first?!?