Experimental setup used to evaluate response of Diacamma indicum colonies to nest flooding. Three identical boxes lined with plaster of paris and provided with an artificial nest were placed at ground level (A) and at elevations of 61 cm (B) and 122 cm (C) from the ground. A and C were connected to B by 91 cm bridges. The old nest with the colony was placed in B. The figures next to boxes A and C indicate the number of colonies that relocated to the upper and lower nests in control and water treatment experiments.