The Ground Beetle is a member of the family Carabidae, Genus Dicaelus. This large beetle family has over 3,000 species in North America. They are found under logs, rocks, and leaves in moist areas. These beetles measure 1/8-1 3/8″ (3-36 mm) long. Many are shiny black, but some are brightly colored.
- They have a conspicuous prothorax, narrow head, and long legs with spurs on the tibiae. The threadlike antennae arise from between large compound eyes.
- Most ground beetles rapidly pursue prey at night. A few eat pollen, berries, and seeds.
- Some species lay eggs in cells made of mud, twigs, and leaves. The larvae are predators, and take 1 year to grow from eggs to adults.
- Adults usually live 2-3 years, or rarely 4 years.
- Beetles are a group of insects which have the largest number of species. They are placed in the order Coleoptera, which means “sheathed wing” and contains more described species than in any other order in the animal kingdom, constituting about twenty-five percent of all known life-forms. Forty percent of all described insect species are beetles (about 350,000 species), and new species are frequently discovered. Estimates put the total number of species, described and undescribed, at between 5 and 8 million.
- Beetles can be found in almost all habitats, but are not known to occur in the sea or in the polar regions. They interact with their ecosystems in several ways. They often feed on plants and fungi, break down animal and plant debris, and eat other invertebrates. Some species are prey of various animals including birds and mammals. Certain species are agricultural pests, such as the Colorado potato beetle Leptinotarsa decemlineata, the boll weevil Anthonomus grandis, the red flour beetle Tribolium castaneum, and the mungbean or cowpea beetle Callosobruchus maculatus, while other species of beetles are important controls of agricultural pests. For example, coccinellidae (“ladybirds” or “ladybugs”) consume aphids, scale insects, thrips, and other plant-sucking insects that damage crops.