Ringing & Migration VOLUME Editor James A Fowler. Editorial Panel Franz Barlein, Peter Ferns, Stephen Norman, David Norman and Juliet Vickery

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1 Ringing & Migration VOLUME Editor James A Fowler Editorial Panel Franz Barlein, Peter Ferns, Stephen Norman, David Norman and Juliet Vickery ISSN

2 Ringing & Migration List of Line Drawings in Volume 14 Page Great Tit (A. J. MACKAY)... Inside front cover Oystercatchers (unknown artist) Robin (M. L. CORNISH) Cory s Shearwater (A. J. MACKAY) Greenfinch (M. L. CORNISH) Red-backed Shrike (A. J. MACKAY) Storm Petrel (A. J. MACKAY) Aquatic Warbler (M.L.CORNISH) Razorbills (A.J.MACKAY) Subalpine Warbler (unknown artist ) Published by BTO, The Nunnery, Thetford, Norfolk IP24 2PU, UK

3 Ringing & Migration Contents of Volume 14, 1993 Part 1 (April 1993) Page Report on bird ringing in Britain and Ireland for C. J. Mead and J. A. Clark... 1 Part 2 (August 1993) Whitethroat Sylvia communis population studies during at a breeding Site on the Lincolnshire coast. M. Boddy A comparison of autumn migration strategies in Robins Erithacus rubecula at a coastal and an inland site in southern Sweden. S. Ehnbom, L. Karlsson, R. Ylven and S. Åkesson Age and sex determination of Barn Owls Tyto alba alba. I. R. Taylor Variation in measurements of Cory s Shearwater between populations and sexing by discriminant analysis. J. P. Granadeiro A check on the efficiency of finding colour-ringed Kittiwakes Rissa tridactyla. M. P. Harris and J. Calladine Seasonal movements of Greenfinches Carduelis chloris ringed in north-west England. I. G. Main Sexing members of a Scottish Blue Tit Parus caeruleus population in the hand during the winter months. G. W. Scott Site fidelity and population structure of the Red-backed Shrike Lanius collurio in Northern Italy. R. Massa, L. Bottoni and L. Fornasari Initial results of Storm Petrel Hydrobates pelagicus ringing in Portugal. P. Harris, J. A. Fowler and J. D. Okill Female Starlings sharing the same nest box. M. Eens and R. Pinxten Part 3 (December 1993) Post-juvenile moult and dispersal in the Meadow Pipit Anthus pratensis. T. W. Dougall The effect of drought on bird migration through Southern Portugal. G. A. Vowles and R. S. Vowles Juvenile Little Terns starting primary moult in Europe. L. Serra Biometrical differences between sexes in a breeding population of Aquatic Warblers Acrocephalus paludicola. A. Dyrcz Report on bird ringing in Britain and Ireland for C. J. Mead, J. A. Clark and W. J. Peach

4 Ringing & Migration Index to Volume 14 Compiled by Hugh Insley All species of bird mentioned in the text are included except those mentioned in the 1991 and 1992 Ringing Reports. Page numbers given are those of the first mention of the species in each paper. Acrocephalus arundinaceus 151 A. paludicola 149 A.schoenobaenus 80 Adelie Penguin Age determination 94 distribution 89 ÅKESSON, S. (see EHNBOM, L., KARLSSON, L., YLVEN R. and ÅKESSON, S.) Anthus pratensis 137 Aquatic Warbler 149 Barn Owl 94 Black-capped Chickadee 125 Blue Tit 124 BODDY, M. Whitethroat Sylvia communis population studies during at a breeding site on the Lincolnshire coast 73 Body mass 88, 139, 149 BOTTONI, L. (see MASSA, R., BOTTONI, L. and FORNASARI, L.) CALLADINE, J. (see HARRIS, M. P. and CALLADINE, J.) Calonectris diomedia 103 Carduelis chloris 117 Constant effort sites 14, 160 Cory s Shearwater 103 C. frugilegus 125 C. monedula 125 Dispersal, post-fledging 137 DOUGALL, T. W. Post-juvenile moult and dispersal in the Meadow Pipit Anthus pratensis. 137 DYRCZ, A. Biometrical differences between sexes in a breeding population of Aquatic Warblers Acrocephalus paludicola 149 EENS, M. and PINXTEN, R. Female Starlings sharing the same nest box 135 EHNBOM, L., KARLSSON, L., YLVEN, R. and ÅKESSON, S. A comparison of autumn migration strategies in Robins Erithacus rubecula at a coastal and an inland site in southern Sweden 84 Erithacus rubecula 84

5 Fat score 84 Fidecula hypoleuca 144 FORNASARI, L. (see MASSA, R., BOTTONI, L. and FORNASARI, L.) FOWLER, J. A. (see HARRIS, P., FOWLER, J. A. and OKILL, J. D.) Fulmar 125 Fulmarus glacialis 125 Gallinula chloropus 125 Garden Warbler 144 Goldcrest 141 GRANADEIRO, J. P. Variation in measurements of Cory s Shearwater between populations and sexing by discriminant analysis 103 Great Reed Warbler 151 Great Tit 128 Greenfinch 117 HARRIS, M.P. and CALLADINE, J. A check on the efficiency of finding colour-ringed Kittiwakes Rissa tridactyla 113 HARRIS, P., FOWLER, J. A. and OKILL, J. D. Initial results of Storm Petrel Hydrobates pelagicus ringing in Portugal 133 Hydrobates pelagicus 133 Integrated population monitoring 3 Jackdaw 125 KARLSSON, L. (see EHNBOM, L., KARLSSON, L., YLVEN, R. and ÅKESSON, S.) Kittiwake 113 Lanius collurio 129 Little Tern 148 MAIN, I. G. Seasonal movements of Greenfinches Carduelis chloris ringed in northwest England 117 MASSA, R., BOTTONI, L. and FORNASARI, L. Site fidelity and population structure of the Red-backed Shrike Lanius collurio in Northern Italy 129 Meadow Pipit 137 Migration, autumn 84, 143 Moorhen 125 Motacilla alba yarrellii 141 Moult 137, 148 post-nuptial 85 OKILL, J. D. (see HARRIS, P., FOWLER, J. A. and OKILL, J. D.) Orientation 86 Oryctolagus cuniculus 82 Parus atricapillus 125 P. caeruleus 124

6 P. major 128 Pied Flycatcher 144 Pied Wagtail 141 PINXTEN, R. (see EENS, M. and PINXTEN, R.) Polygamy 149 Polygyny 135 Rabbit 82 Red-backed Shrike 129 Regulus regulus 141 Rissa tridactyla 113 Robin 84 Rook 125 SCOTT, G. W. Sexing members of a Scottish Blue Tit Parus caeruleus population in the hand during the winter months 124 Sedge Warbler 80 SERRA, L. Juvenile Little Terns starting primary moult in Europe 148 Sex determination 95, 126 ratio 79, 138 Site fidelity 129 Starling 135 Sterna albifrons 148 Storm Petrel 133 Strix aluco 135 Sturnus vulgaris 135 Subalpine Warbler 144 Survival rate 73 Sylvia borin 144 S. cantillans 144 S. communis 73, 144 TAYLOR, I. R. Age and sex determination of Barn Owls Tyto alba alba 94 Tawny Owl 135 Tyto alba 94 VOWLES, G. A. and VOWLES, R. The effect of drought on bird migration through Southern Portugal 143 Whitethroat 73, 144 Wing length 126, 138, 149 YLVEN, R. (see EHNBOM, L., KARLSSON, L., YLVEN, R. and ÅKESSON, S. )