Fen Raft Spider / Great Raft Spider {Dolomedes plantarius} adult female guarding nursey web containg spiderlings. As seen here, females often build their nursery webs amongst Water Soldier {Stratiotes aloides}. Norfolk Broads, UK. August. IUCN Red List 'Vulnerable' species and endangered in the UK where it is fully protected by law under Schedule 5 of the Wildlife and Countryside Act 1981. This photograph was taken under licence.