The edge represent the wildflowers and grasses belts around the field. The southern and western boundaries of the field are near to the road, and the other two edges neighbour another field. Sampling plots were evenly allocated at 10-m intervals in 1-ha field. Food sources, which included wildflowers, grasses, and maize, caused a seasonal migration of A. fuscicollis. Most adults mated in the wildflowers and grass belt after overwintering. The adults were able to feed on the flowers as their primary nutrition source before mating. The larvae immigrated to the field in the maize seedling stage in spring; however, they emigrated during the corn jointing stage in summer.