Rhododendron and Bumble Bee

羊角杜鵑 - 攝於2017年4月初

Bumble Bee-Initiated Vibration Release Mechanism of Rhododendron Pollen
Marcus J. King and Stephen L. Buchmann
American Journal of Botany
Vol. 82, No. 11 (Nov., 1995), pp. 1407-1411
http://www.jstor.org/stable/2445867