I keep some pieces of tree bark in an area of the garden, along with a few branches, which help to give shelter to animals. Occasionally I peer underneath. I know these slimy critters aren’t to everybodies taste, but they all play their role in keeping nature’s balance, and are little wonders in themselves. The trio of Common Chrysalis Snails in the top image are around 4.4 mm (1/4 in) long, and the Discus Snail in the last image is a little bigger at 7 mm in diameter. Iberian Three-band Slug centre looks to be a young juvenile.