Toxicological trivia from November 13, 2013: Some flowers may have evolved to ‘catch’ the bugs, according to a study by the University of Haifa in Israel, published in February 2010. "Might even be a form of evolution of flowers, addiction seeking insects to your juice," Ido Izhaki, the biologist research director, suggested. The floral nectar is composed of sugars, which provide energy for pollinators and other compounds. Bees prefer nectar containing small doses of:a) Caffeine;b) Nicotine;c) Both previous answers are correct.

Correct answer c. For example, favorite nicotine concentration is 1 milligram per liter of nectar. Raed more in Spanish article: Try bees foraging preferable nicotine or caffeine flowers. Read also original paper: Natarajan Singaravelan, Gidi Nee’Man,Moshe Inbar, and Ido Izhaki. Feeding responses of free-flying honeybees to secondary compounds mimicking floral nectars. Journal of Chemical Ecology, Vol. 31, No. 12, December 2005 (#2005) DOI: 10.1007/s10886-005-8394-z