Most fireflies also have orange or yellow markings on their backside or head areas. Fireflies belong to a group of luminescent North American beetles, which are able to give off light signals by means of chemical reaction. Organs located in the abdomen of the firefly display bright flashes of light, which are used as a means of communication. Fireflies give off light in a rhythmic pattern to attract mates or send a warning signal to others. There are more than 170 different species of fireflies in the United States.
Fireflies live on every continent in the world, except Antarctica.
Each species of the firefly has different characteristics and abilities. Daytime fireflies, for example, are incapable of producing light at all. Instead, they emit pheromones to attract mates. Some species of female fireflies are wingless, and rely only on their light to attract flying males. The common North America firefly is most often found in hot, humid regions.