Ardea 105 (1)

Ornithology from the tree tops. Of predation and life Bijlsma R.G.
Effect of brood size on food provisioning rate in Common Kingfishers Alcedo atthis Čech M. & Čech P.  
Why did Lapwings Vanellus vanellus in managed habitat advance egg laying during a period without warming early springs? Brandsma O.H., Kentie R. & Piersma T.  
An expanding hybrid zone between Black-headed and Red-headed Buntings in northern Iran Gholamhosseini1 A., Aliabadian M., Darvish J., Töpfer T. & Sætre G.-P.  
An acoustic comparison of mimetic and nonmimetic song in Northern Mockingbirds Mimus polyglottos Gammon D.E. & Lyon R.P.  
Delayed age at first breeding and experimental removals show large non-breeding surplus in Pied Flycatchers Both C., Burger C., Ouwehand J., Samplonius J.M., Ubels R. & Bijlsma R.G.  
Nest sites of a strong excavator, the Great Spotted Woodpecker Dendrocopos major, in a primeval forest Hebda G., Wesołowski T. & Rowiński P.  
Urban roost of wintering Barn Swallows Hirundo rustica in Aveiro, Portugal van Nus T. & Neto J.M.  
Dietary characterization of Savi’s Warbler Locustella luscinioides and Great Reed Warbler Acrocephalus arundinaceus in eastern Spain Ferreiro-Carballal S., Belda E.J., Ceresa F. & Monrós J.S.