Fig. 2. (A) Diagram of the set-up used to film and photograph digging behaviour in Leposternon microcephalum. The glass terrarium used was 0.75x0.60x0.012 m. (B) Diagram of the system used to measure forces produced by L. microcephalum during digging: a, purpose-built plastic rig to secure the strain gauge; b, casing for the strain gauge; c, blade assemblage of the strain gauge; d, individual being tested, depicted while `digging' against the strain gauge.