This is how we know it is late dry season: click beetles with headlights! We were recently doing bat surveys near Laguna Seca in Gallon Jug Estate, and the night was lit with these interesting large beetles. It is amazing how much light is put out by them!
In the family Elateridae, click beetles have the ability to make a snapping sound thought to help them avoid predation. If the beetle finds itself upside down, the ability to click pops it up and over, right side up.