For a snail, smell is the prominent sense, but using visual cues may be important when differentiating the surroundings of an environment. The purpose of this experiment was to test the ability of land snail Cornu aspersum to follow trail scents and visual cues to find its preferred food, cucumber. Ninety snails were fed cucumbers and carrots for two days prior to testing. Each snail was exposed to three trails of the same scent that lead to three different food vials; one of cucumber, one of carrot, and one that was empty. Thirty snails were exposed per each “flavor” of trail (cucumber; carrot; water). Snails that successfully followed trails to a food vial chose cucumber the most, although many snails did not follow a trail. Results show that snails may not rely as heavily on sight than smell when searching for food in an environment of conflicting smells and visuals.
Kelley, Amanda. "Seeing is believing? How snails find food." Curiosity to Creativity Spring Symposium, 25 April 2018, Oklahoma Memorial Union, Norman, OK.