Every fall, two things happen that mark the shift from summer into the fall. The first is when someone calls to ask when to stop feeding the hummingbirds. The answer is whenever the hummingbirds stop eating the sugar water. They know when they need to fly south, and no amount of enticement on our part will convince them to stick around for winter.
The second is when someone brings me a beautiful red leaf to identify.
There is, of course, plenty of non-hazardous beauty out there.