Because of reduced daylength and radiant warmth, a great number of natural events begin to occur in northern latitudes to deal with the cold frigid air that will soon come.
Trees turn gold and crimson after shutting down their photosynthetic machinery for the season.
A popular strategy among more mobile types of animals is to vacate the areas of cold to find food and comfort in more southern latitudes. Ducks, geese, and hundreds of other species of migratory birds begin to move out of the north into areas of more abundant food. But most insects cannot fly the long distances that migratory birds fly. Many have evolved an ability to tolerate the cold, timing their development so that when the cold comes, they are in life stages, such as eggs or larvae, that are more compatible with winter's temperatures. They may also dehydrate themselves, thus getting rid of much of the water from their bodies that could freeze and kill them.