Loeske E. B. Kruuk FRS is an evolutionary ecologist who is a Royal Society Research Professor at the University of Edinburgh.

[1] Kruuk started her academic career in 1988 studying mathematics at Somerville College, Oxford.

[5] During this position, she started to appreciate the power of long-term wild animal population studies in understanding evolutionary ecology and quantitative genetics.

Her work focuses on wild vertebrate species,[6][7] and considers evolution and natural selection in natural populations, effects of ongoing environmental change, quantitative genetics, inbreeding and inbreeding depression, maternal effects and life history evolution.

[2][8]In 2021, Kruuk was selected as one of the Royal Society Research Professors, which allowed her to return to the University of Edinburgh.