Archaeognatha, commonly known as bristletails, are a group of primitive insects characterized by their elongated bodies and long, bristle-like tails. They are wingless and typically found in moist environments, such as leaf litter and under stones. These insects are known for their unique jumping ability, which they achieve by rapidly flexing their bodies. Bristletails are part of the order Thysanura, which also includes silverfish. They have a simple life cycle, undergoing gradual metamorphosis without a pupal stage. Archaeognatha are primarily nocturnal and feed on organic matter, algae, and decaying plant material, playing a role in nutrient recycling in their ecosystems.