Melanotus morosus is a small, nocturnal insect belonging to the family Elateridae, commonly known as click beetles. It has a slender body, measuring around 1.5 centimeters in length, with a dark brown or black coloration. This species is known for its ability to produce a clicking sound by snapping its thorax against its abdomen, which is used as a defense mechanism to startle predators. Melanotus morosus is typically found in forested areas, where it feeds on decaying plant matter and occasionally on other small insects.