This shows a foraging hawkmoth at an artificial flower that is emitting an attractive flower scent. Manduca sexta moths use their sense of smell to locate and discriminate between innately attractive flowers, but they also have the ability to learn - through olfactory conditioning - to utilize other nectar resources. This image relates to a paper that appeared in the Dec. 6, 2012, issue of Science Express, published by AAAS. The paper, by Jeffrey Riffell at University of Washington in Seattle, Wash., and colleagues was titled, "Neural Basis of a Pollinator's Buffet: Olfactory Specialization and Learning in Manduca sexta."
[Image courtesy of Charles Hedgcock, Department of Neuroscience at University of Arizona, and Jeff Riffell, Department of Biology at University of Washington]