
Often confused with wasps, hoverflies are diptera (a single pair of wings). They have the distinction of having sharp changes in direction, and to practice hovering. They are harmless and very useful. The larvae feed on aphids and protect gardens. As for adults, they feed on pollen and nectar. They play an important role in pollination. Their presence is evidence of biological and ecological wealth. These are very fine quality and environmental diversity indicators. Inventories help to guide management, especially forestry, as it was developed in the National Nature Reserve of Lake Remoray in the Doubs and Jura.