Leaf miners are small insects, often larvae, that live inside the leaves of plants. They create distinctive trails or patterns as they feed on the leaf tissue, which can weaken the plant and reduce its ability to photosynthesize. Common types of leaf miners include moths and flies. These pests can affect a variety of plants, including vegetables, flowers, and trees. While they may not always cause severe damage, heavy infestations can lead to reduced growth and yield. Managing leaf miners often involves monitoring plants and using natural predators or insecticides when necessary.