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Ibis

Vol. 141, No. 3. July 1999

COMMENT

N.J. Collar New species, high standards and the case of Laniarius liberatus 358

PAPERS

J.D. Goss-Custard, J.T. Cayford & S.G. Lea Vigilance during food handling by Oystercatchers Haematopus ostralegus reduces the chances of losing prey to kleptoparasites 368

S.J. Marsden Estimation of parrot and hornbill densities using a point count distance sampling method 377

L. Wennerberg, N.M.A. Holmgren, P.-E. Jönsson & T. von Schantz Genetic and morphological variation in Dunlin Calidris alpina breeding in the Palearctic tundra 391

T. Meijer & R. Drent Re-examination of the capital and income dichotomy in breeding birds 39

D.E. Chamberlain, B.J. Hatchwell & C.M. Perrins Importance of feeding ecology to the reproductive success of Blackbirds Turdus merula nesting in rural habitats 415

F. Jiguet & P. Jouventin Individual breeding decisions and long-term reproductive strategy in the King Penguin Aptenodytes patagonicus 428

C.J. Pennycuick, T.A.M. Bradbury, Ó. Einarsson & M. Owen Response to weather and light conditions of migrating Whooper Swans Cygnus cygnus and flying height profiles, observed with the Argos satellite system 434

G.R. Martin Eye structure and foraging in King Penguins Aptenodytes patagonicus 444

A.F.H. Ros Effects of testosterone on growth, plumage pigmentation, and mortality in Black-headed Gull chicks 451

M. Orell, K. Lahti & J. Matero High survival rate and site fidelity in the Siberian Tit Parus cinctus, a focal species of the taiga 460

C. Barbraud, J.-C. Barbraud & M. Barbraud Population dynamics of the White Stork Ciconia ciconia in western France 469

D. Fortin, F. Liechti & B. Bruderer Variation in the nocturnal flight behaviour of migratory birds along the northwest coast of the Mediterranean Sea 480

SHORT COMMUNICATIONS

M. Honza, A. Moksnes, E. Roskaft & I.J. Řien Effect of Great Reed Warbler Acrocephalus arundinaceus on the reproductive
tactics of the Reed Warbler A. scirpaceus 489

O. Hogstad Territorial behaviour of non-breeding Willow Warblers Phylloscopus trochilus during the breeding season 493

F.M. Slater First-egg date fluctuations for the Pied Flycatcher Ficedula hypoleuca in the woodlands of mid-Wales in the twentieth century 497

J. González-Solís, H. Wendeln & P.H. Becker Nest-site turnover in Common Terns: possible problems with renest studies 500

G. Blanco & R. Rodriguez-Estrella Reduced sexual plumage dimorphism in Ospreys from Baja California Sur, México 502

I. Wyllie & I. Newton Use of carcasses to estimate the proportions of female Sparrowhawks and Kestrels which bred in their first year of life 504

RECENT ORNITHOLOGICAL PUBLICATIONS 507

OBITUARY - John H. Elgood (1909–98) 523

BOU INFORMATION 524

NEWS AND NOTICES 525

BOU ANNUAL REPORT 531

GODMAN-SALVIN MEDAL

GEORGE RICHARD POTTS 543

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