Participants of the southwestern-Africa expedition. Left to right: Brian Cogan, Dave Hollis, Peter Hammond, Mick Day, Dick Vane-Wright (Photo by permission of the Trustees of the Natural History Museum).
Part of: Noyes JS, Else GR (2020) Michael Charles Day (1942–2020). Journal of Hymenoptera Research 80: 193-202. https://doi.org/10.3897/jhr.80.60742