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Photo SP T Plate 252. I was surprised© to see a Pomarine Skua rested on the barge before continuing westwards. flying west along Loch Ness in the Great Glen, It is well known that in late summer and autumn, S C Highland, on 20 May 2007; it did not stop and later skuas pass Chanonry Point on the Black Isle and O T on 23 & 24 May I saw several, together with Arctic continue westwards presumably down the Great T I Skuas, further west around the salmon cages at Glen, but a spring passage in this direction seems S H Ardgour in Loch Linnhe. I had no such sightings on less usual. I assume that most or all the skuas seen B a trip at the same time of year in 2009, and noted at Ardgour in 2007 had also flown down the Glen I R that the cages were then so covered in netting they rather than turned eastwards a considerable D were inaccessible to skuas and gulls. distance from their more usual spring passage S V north up the west coast. A small passage of skuas o l On 24 May 2011, after exceptionally stormy along the Glen itself would be difficult to observe u weather with severe south-westerly gales the m from the shore, so could easily be overlooked, e previous day, the Pomarine Skua shown here especially in spring when few birds are likely to 3 1 appeared from the east and followed the barge take this route. ( 3 westwards for a couple of hours along Loch Lochy, ) another of the chain of lochs which form part of Camera: Nikon D90, shutter priority 1/1250 sec, the Caledonian Canal along the Great Glen. It Nikon 70/300mm at 135mm f4.8. frequently circled and occasionally landed and Nick Picozzi S e p t e m b e r 2 published by the 0 1 1 SCOTTISH ORNITHOLOGISTS’ CLUB Featuring the best images posted on the SOC website each quarter, PhotoSpot will present stunning portraits as well as record shots of something unique, accompanied by the story behind the photograph and the equipment used. Send in your photos now - it’s open to all. V OLUME 31(3) S EPTEMBER 2011 The Scottish Ornithologists’ Club (SOC) was formed in 1936 to SOC Branch Secretaries encourage all aspects of ornithology in Scotland. It has local Scottish Ayrshire: Anne Dick Grampian: Graham Cooper branches which meet in Aberdeen, Ayr, the Borders, Dumfries, Rowanmyle House, Tarbolton, Mauchline KA5 5LU. Westbank, 72 Beltie Road, Torphins, Banchory Dundee, Edinburgh, Glasgow, Inverness, New Galloway, Orkney, Tel: 01292 541981 AB31 4JT. Tel: 01339 882706 Birds St Andrews, Stirling, Stranraer and Thurso, each with its own Email: [email protected] Email: [email protected] Established in 1958. programme of field meetings and winter lectures. The George Borders: Graham Pyatt Highland: Kathy Bonniface Waterston Library at the Club’s headquarters is the most The Schoolhouse, Manor, Peebles EH45 9JN. 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Collin NE Scotland: Hywel Maggs Waterston House and wildflower ask for an application form by telephoning 01875 871330 or 01671 402861 07751 373793 meadow, June 2011. © June Scott visiting the Club’s website at: www.the-soc.org.uk [email protected] [email protected] ISSN 0036-9144 Scottish Charity Reg. No. SC 009859 Contents Scottish Birds 31:3 (2011) 194 President’s Foreword D. Jardine PAPERS 195 Raptor persecution on a large Perthshire estate: a historical study R.L. McMillan 206 Local changes in bird numbers and habitat use in Midlothian B.E.H. Sumner 220 An aerial survey of the Bass Rock gannetry in 2009 S. Murray SHORT NOTES 226 Natural predation of Golden Eagles D.C. Jardine, M.A. Peacock, R.Y. McGowan & C. Maw OBITURIES 229 Michael Helsdon Murphy (1935–2011) J.H. Murphy ARTICLES, NEWS & VIEWS 230 Red Grouse and Ptarmigan research in Scotland A. Watson 236 NEWS AND NOTICES 240 Bird research at Glasgow University R.W. Furness, M. Hansell, D. Houston, R. Nager & S. White 247 Return to One Man’s Island K. Brockie 250 The South-east Scotland Tetrad Atlas II update R.D. Murray 253 Scottish Bird Report - a digital archive R.D. Murray 256 Bird Track - bird recording enters the internet age C.R. McKay 260 BOOK REVIEWS 263 RINGERS' ROUNDUP R. Duncan 266 Purple Heron, nr Letham, Fife, April 2011 - the first Fife record N. Elkins & C. Nisbet 269 The White-winged Scoter in Aberdeenshire - a new Scottish bird P. Baxter, H. Maggs & C. Gibbins 276 Black Scoter at Murcar and Blackdog, June –August 2011 - a first for North-east Scotland N. Littlewood 279 Hermit Thrushes on Barra and South Uist in October 2010 - the first and second records for the Outer Hebrides S. Duffield & S.L. Rivers BIRDGUIDES REVIEW 284 1 April to 30 June 2011 S. Menzie PHOTOSPOT BC Pomarine Skua N. Picozzi 31:3 (2011) Scottish Birds 193 President’s Foreword President’s Foreword In this 75th anniversary year it is fitting that the Club should seek ways to celebrate the contri - butions of individuals to Scottish ornithology.