Maria Sibylla Merian
Maria Sibylla Merian (2 April 164713 January 1717) was a German-born naturalist and scientific illustrator, a descendant of the Frankfurt branch of the Swiss Merian family. Merian was one of the first naturalists to observe insects directly.
Maria Sibylla Merian
Among her most significant contribution to science is the pairing of each larval lepidopteran, which she observed with a plant on which it feeds. She collected and kept caterpillars and conducted experiments to confirm her observations. She noted "caterpillars which fed on one flowering plant only, would feed on that one alone, and soon died if I did not provide it for them." She documented that some caterpillars would feed on more than one plant, but some only did so if they were deprived of their preferred host plant. Eventually the importance of the plant-host association was recognised and in the early taxonomy of moths and butterflies the species were given names that reflected the plants on which the larvae were found. Today the science of ecology focuses on understanding animals' feeding preferences and which plants play a critical role in the food chain.