Crane flies
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 [...] emerge from the soil in late summer to fall, and females mate and lay 200-300 eggs. Larvae emerge within one week and then feed on roots and crowns of grasses [...] 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