This study also found that the diet of the orange-banded arion is variable throughout the year. For example, there is an increase in animal material eaten during May and June. The hypothesis is that during the colder months, slugs don't move around much under the leaf litter, and take in a lot of leaves where the chlorophyll has already broken down, but during the warmer months, they take advantage of dead earthworms and small arthropods, both of which have high mortality rates.
