Figure 1 from: Nalepa C (2012) Wing wear is a poor estimate of age in Cerceris fumipennis (Hymenoptera, Crabronidae). Journal of Hymenoptera Research 24: 43-46. https://doi.org/10.3897/jhr.24.2091

Figure 1 - Technique used in attempting to determine number of Cerceris fumipennis generations per year based on wing wear. A Marked female; B Field photograph of right wing, showing reference points for analysis; C1 Undamaged wing of Female #2 (30 May); C2 Damaged wing 18 days later. D Plot of percent wing damage over time in 9 females, based on pixel counts of before (baseline) vs. after wings.