Pitfall traps were placed either by water to collect invertebrates that live near water or placed on land banks to collect invertebrates living there. This placement strategy gave a stronger chance of visibility in invertebrate habitat. Pitfall traps were made by using a small glass jar half-filled with green antifreeze, to attract as many invertebrates as possible. The glass jars were then placed in a hole, dug into the ground and covered with a loose netting. A flag was then placed at the position of the trap for easy location. After placing each trap into the ground, data consisting of GPS coordinates, time of trap placement, and basin name were recorded into a table.