Females of Heteropteryx dilatata are the heaviest known Phasmids. A female laden with eggs may weigh in excess of 65g (Brock, 1999). The heaviest recorded specimen at a PSG meeting (belonging to Kristien Rabaey and Rob Simoens) weighed in at 49.2g (Smith, 2007), but culture stocks are likely to be significantly smaller than wild specimens are.