Early pioneer in the field of insect behavior Charles Henry Turner (1867-1923): Charles Henry Turner trained as a zoologist and did groundbreaking work in the fields of entomology and comparative psychology, publishing over 70 papers and working for equality in the sciences. He devised many brilliant experiments furthering our understanding of the natural world – For us beekeepers, of particular interest are his experiments about honey bees (and this is just a few!):
Studied problem solving and pioneered cognitive views on animal behavior
Wrote multiple works on insect homing and navigation with description and analyses of bee behavior
Determined that memory was a fundamental property of navigation strategies
Did ground-breaking experiments on honey bee color vision (1910)
Pioneered interpretation of honey bee foraging within an associative-learning framework
For more on Turner there is an excellent article at the Marginalian