The past and present status of the European Otter, Lutra lutra , in the vicinity of Abingdon, Oxfordshire, England. January 2015 Bob Eeles 1, Roger Wiggins and Richard Harrison, with a contribution from Graham Bateman. An Otter, Lutra lutra , swimming upstream in daylight through Yellow water lilies, Nuphar lutea , along the river Ock to the west of Abingdon, Oxfordshire, on the 9 th June 2011. © Richard Harrison. 1 5 Mullard Way, Abingdon, Oxon, OX14 1DT, 07548772135,
[email protected] 1 CONTENTS 1.0 Introduction. 3 1.1 Historical records. 4 1.2 An absence of Pleistocene records (243,000 years before present until 40,000 years ago). 4 1.3 Post-glacial records (Bronze-Age until 1956). 4 1.4 Field signs (post-1956 records). 10 1.4.1 Spraints. 10 1.4.2 Footprints. 14 1.4.3 Sightings. 14 1.4.4 Fish predation. 14 1.4.5 The Pumney mussel ‘midden’. 16 1.4.6 Holts. 17 1.4.7 Couches. 17 1.5 Distribution maps. 17 1.6 The river Ock. 18 1.7 The Swiftditch. 21 1.8 Gravel pits. 23 1.9 Minor watercourses. 23 1.10 The main Thames channels. 23 1.11 Surveys of Otters on the Thames conducted by the EA and their predecessors. 24 2.0 Discussion and conclusions. 25 3.0 A report by Roger Wiggins. 26 4.0 A report by Richard Harrison. 31 Appendix 1: Historical and recent Otter records by various observers around Abingdon, Oxfordshire. 35 Appendix 2: Unverified Otter reports. 47 Appendix 3: Dates when sites were visited in the recent past when no Otter spraints or other field signs were found.