Crane flies
during the autumn.. Larvae overwinter in the soil, usually in the third instar stage. and start feeding again in spring. They become active again and feed [...] Eggs are black in colour, oval, 1mm long and deposited on the soil surface. Larvae are cylindrical, tapering toward the head, and grey-brown in colour. Larvae [...] feed voraciously when the soil begins to warm up in spring. The larvae pupate below the soil surface in summer. The pupal stage lasts about two weeks.