Theba pisana

Detection is straightforward. Adult snails are normally 15-18 mm in width and readily seen, especially as they tend to rest or aestivate on the plants above the ground during the day and in hot conditions. Juveniles are smaller but are also quite readily seen. Usually population densities are high, making the snails even more readily visible. Detection and inspection is by visual searching. Searching should be focussed on plants, fences, and other vertical surfaces on which the snails rest exposed well above the ground surface, especially in sandy areas. Shipping materials (crates, pallets, containers) coming from areas where the snails are known to exist should be examined. Although generally readily visible, nooks and crannies in containers and shipping materials and cargo should be carefully searched.