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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.