snails or lissachatina fullica

achatina achatinidae african animal antenna background belonging brown closeup crawl environment food forest fulica fullica gastropod gastropoda giant green ground helix herbivorous invasive invertebrate isolated its keong land large leaf lissachatina macro mollusc mollusk motion natural nature one outdoor pavement pet raining shell slime slimy slow slug small snail snails species speed spiral tribe walk wet wild wildlife