In memory of Sue Nicolson.

The obituary in "African Zoology" honors the life and work of Professor Sue Nicolson, a renowned leader in evolutionary and ecological physiology in South Africa. Sue's research focused on water and energy balance in insects, particularly nectar-feeding species, and later expanded to include vertebrates like sunbirds and rodents. Her contributions to the field were extensive, with approximately 185 papers published and two impactful books authored. Sue's legacy includes her exceptional mentorship of students and postdoctoral fellows, as well as her significant role in the scientific community. [Extracted from the article]