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Ritchie, J.  (1912) Death's head moth in the Outer Hebrides. Scottish Naturalist 1912: 156-166

Ritchie, W.  (1967) The Machair of South Uist. Scottish Geographical Magazine 83: 161-173

Ritchie, W.  (1976) The meaning and definition of machair. Transactions of the Botanical Society of Edinburgh 42: 431-440

Ritchie, W.  (2011) Machair development and chronology in the Uists and adjacent islands. Proceeding Royal Society Proceeding Royal Society Edinburgh. Section B Biological Sciences 77: 107-122

Ritchie, W. & Mather, A.  (1971) The Beaches of Lewis and Harris: A Survey of the Beach, Dune and Machair Areas of Lewis and Harris. Scottish Natural Heritage Commissioned Report Number 47  

Ritchie, W., Whittington, G. & Edwards, K. J.  (2001) Holocene changes in the physiography and vegetation of the Atlantic littoral of the Uists, Outer Hebrides, Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences 92: 121-136

Robarts, James H.  (2005) Orchids of Barra. Voluntary Action Barra and Vatersy  

Robinson, J. & Hancock, E. G.  (2009) The morphology and colour polymorphism of the St Kildan weevil Ceutorhynchus insularis Dieckmann, 1971 (Coleoptera; Curculionidae). The Entomologist's Monthly Magazine 114: 211-216

Robinson, J. A., Colhoun, K., McElwaine, J. G. & Rees, E. C.  (2004) Whooper Swan Cygnus cygnus (Iceland population) in Britain and Ireland 1960/61 - 1999/2000. White Horse Press, Cambridge  

Robinson, J., Hancock, E. G., Hewitt, S. M. & Mann, D.  (2015) The terrestrial invertebrate fauna of Mingulay, including 18 new species records for the Outer Hebrides. The Glasgow Naturalist 26: 71-83

Robson, Michael  (1991) Rona. The Distant Island. Acair, Stornoway   179

Roebuck, W. D.  (1918) The Molluscan Fauna of the Outer Hebrides. The Scottish Naturalist 84: 275-286

Roper, P. & Ackland, D. M.  (2002) A second British record of Delia lavata (Boheman, 1863) (Diptera, Anthomyiidae). Dipterists Digest (Second Series) 9: 94

Roper, T., Skidmore, P. & Pont, A. C.  (1999) Helina cinerella (Wulp, 1867) (Dipt., Muscidae), new to Britain.. Entomologist's Monthly Magazine 135: 207-209

Rostron, R.  (1984) Western Isles sea loch survey, July 1984. Nature Conservancy Council, CSD Report, Number 594  

Rothschild, M.  (1955) The distribution of Ceratophyllus borealis Rothschild 1906 [1907] and C. garei Rothschild, 1902 with records of specimens intermediate between the two. Transactions of the Royal Entomological Society of London 107: 295-317

Rothschild, M.  (1958) Fleas from the nest of the St Kilda wren (Troglodytes troglodytes hirtensis (Seeb.)). Entomologist 91: 76

Rothschild, N.  (1907) A new British flea. Entomologist 43: 11

Roy, S. S., Chauvenet, A. L. M. & Robertson, P. A.  (2015) Removal of American mink (Neovison vison) from the Uists, Outer Hebrides, Scotland. Biolgical Invasions 17: 2811-2820

Roy, S. S., Macleod, I. & Moore, N. P.  (2006) The use of scent glands to improve the efficiency of mink (Mustela vison) captures in the Outer Hebrides. New Zealand Journal of Zoology 33: 367-271

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