During the dark season what little eyesight he has becomes a lot less powerful and he has to bide his time and wait out the season nearly blind. Luckily, this is also the safe season. If the bug thinks in terms of danger, the worst time is probably early light season when monsters come down out of the sky and swallow him and others of his kind. But at least he can be a little more active looking for food in the light season. Of course some light seasons are not as light as others.
Some years there is only a dim light season.
Some years that is the only difference, and that he can live with. Some dim years the balance of nature is upset and immense globules of water seem to come out of the sky and hit you wherever you stand. Most bugs know water, of course, but not in this form. Some of these streaks of water are many times the length of the bug and if you do not dodge them, they can kill you. But dodging them is nearly impossible since they are almost everywhere.