Yellow Cellar Slug ID Guide

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Wanted! Have you seen the yellow cellar slug? What do we want you to do? • Grab a torch and go on a slug hunt in your garden to see if you can find this nocturnal species • Take photographs showing the top of each slug • Match your slug to the ID guide (overleaf) • Use the online form to let us know what you found and where Why? Over the past 30 years, reports of the yellow cellar slug have declined sharply. During this time a second species, the green cellar slug, has started spreading throughout Britain and Ireland. Where is the yellow cellar slug? Has the green species taken over? Are we about to witness a slug go extinct in Britain? We need your help to find out! To take part visit rhs.org.uk/slugsurvey RHS Registered Charity No. 222879 / SC038262 Have you seen these slugs? There are three large patterned slugs you are likely to find in your garden: Yellow cellar slug (Limacus flavus) 5 cm Clear yellow slime Long yellow stripe running along centre of tail Green-yellow bodies Blue-grey tentacles Green cellar slug (Limacus maculatus) Clear yellow slime Yellow stripe not present or very short Leopard slug (Limax maximus) Clear slime Tail often heavily striped Images approximately Brown-grey body Red-brown tentacles to scale. Both species of cellar slugs are not considered plant pests and may be beneficial to gardeners. After taking your photographs we ask that you return any of these slugs to where you found them. To take part and find out more visit: rhs.org.uk/slugsurvey All images © Amgueddfa Cymru – National Museum Wales..

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Slugs of Britain & Ireland
TEST VERSION 2013 SLUGS OF BRITAIN & IRELAND (Short test version, pages 18-37 only) By Ben Rowson, James Turner, Roy Anderson & Bill Symondson PRODUCED BY FSC 2013. TEXT AND PHOTOS © NATIONAL MUSEUM OF WALES 2013 External features of slugs Tail Mantle Head Keel Tubercles Lateral bands Genital pore Identification of Slugs Identification Tentacles. Breathing pore (pneumostome) Keel Eyes Variations in lateral banding Mantle markings and ridges Broken lateral bands Mouth Solid lateral bands Sole (underside of foot) Mantle. Note texture and presence of grooves and ridges, as Tubercles. Note whether numerous and small/fine vs. few and well as any markings and banding. large/coarse. Pigment may be present in the grooves between tubercles. Tentacles. Note colour. Slugs may need to be handled or disturbed to extend tentacles. Keel (raised ridge). Note length and whether truncated at the tip of tail. Beware markings that may exaggerate or obscure the Breathing pore (pneumostome). length of keel. On right-hand side of body. Note whether rim is noticeably paler or darker than body sides. Sole (underside of foot). Note colour and any patterning. The sole in most slugs is tripartite i.e. there are three fields running Lateral bands. Note whether present on mantle and/or tail. in parallel the length of the animal. Is the central field a different Note also intensity, whether broad or narrow, and whether high shade from the lateral fields or low on body side. Shell Dorsal grooves. In Testacellidae, note wheth- Mucus pore. er the two grooves meet in front of the shell or Present only in Arionidae underneath it.
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