(Noctuidae) Including more than 26,300 described species available all over the world; it is the biggest family of the Lepidoptera order. It is estimated to have more than 30,000 species worldwide. In the new tropical areas and between India and Australia, this family is more diversified as it includes 8,600 and 6,500 described species respectively. Adults can be small or very big depending on the species and they are mainly nocturnal. While some are crepuscular, a few are diurnal. Larvae are herbivorous feeding mostly on foliage. Most of the species are leaf-miners. Host plants are so diversified but the diet of many of those butterflies is still unknown. Some species of this family are agricultural pests.