Figure 2 in The Roman snail (Gastropoda: Helicidae) is not a generalist herbivore, but shows food preferences for Urtica dioica and plant litter

Figure 2. Relationship between the average feeding height of Helix pomatia in the vegetation per subpopulation, independent of the sample date () or for individual sample dates (●), and the average proportion of individuals feeding on (a) Urtica dioica or (b) plant litter.