Episode 010: Suburban gastropods Posted on September 9, 2012 by admin 2 Listen to Episode 010 Download Episode 010 from Soundcloud Poison ivy Toxicodendron radicans in fall colors. Staghorn sumac Rhus typhina in fall colors. English garden snails Cepaea nemoralis. Note the variation in shell colors. Dusky slug Arion subfuscus. Leopard slug Limax maxima. A pair of leopard slugs begin their mating dance. Photo by @alexbermudez This is the link to the mating slugs clip from David Attenborough’s Life in the Undergrowth. Click here to learn more about English garden snail shell color variation.