Environmental orientation by terrestrial Mollusca with particular reference to homing behaviour

The homing of nine species of slugs and snails was studied in field and laboratory cages. All species were able to relocate artificial shelters from > 1 m distant. When it was rainy or windy, molluscs approached shelters in a spiralling manner, but in calmer, drier weather approaches were direct. Navigational behaviour to shelters was similar among all species.An experiment with Ariolimax columbianus showed that these slugs returned to the same …