The proboscis that curls under a butterfly’s head looks like a custom straw for flower pollen. Biology says otherwise. The structure is optimized for liquid intake, not for scraping or digesting solid pollen grains.The proboscis is a pair of elongated galeae that lock together to form a narrow food canal. Capillary action and muscular pumping draw in dilute nectar and tree sap, both rich in simple...More