Ragnhild Andrine Sundby (6 June 1922 – 29 November 2006) was a Norwegian zoologist who specialized in entomology.
She immediately received a scholarship from the Norwegian Research Council for Science and the Humanities in order to investigate the causes of violent fluctuations in miner moth populations.
In 1958, she earned a doctorate for a dissertation which concluded the fluctuations of miner moth populations were mainly a result of parasitic wasps.
[1] Thanks to her doctorate, in 1958 she was appointed senior lecturer at the Norwegian College of Agriculture where she was charged with expanding the Department of Zoology.
[1] In 1959, Sundby spent 15 months at the University of California working with Paul DeBach, an expert on biological (rather than chemical) means of insect control.