Slug Art I have a sheet of poly covering my grape arbour. Over time the poly gets covered with a green algae and slugs find it an enjoyable meal. This is a slug trail and you can see where it licked or chewed the algae creating a rather interesting pattern. Share this:ShareShare on TumblrPrintEmailTweetLike this:Like Loading... This entry was posted in The Garden and tagged algae, design, garden, nature, photography, slugs, wildlife. Bookmark the permalink.