Time-lapse recording of pit construction by an antlion (Euroleon nostras).

The pit was constructed in a tub of size 120x120x80mm filled with beach sand and with a constraining circular acetate ring with a 100mm diameter. Still images were recorded at with a Canon 5D MK II camera. The behaviour of the antlion over 25min was converted into 26s of time lapse video at 29fps. Note there is a reversal in the direction of spiral digging at 4s from the start, a short period of digging at the bottom of the pit between 23 and 26s and also that the throwing range declines with time as