Body weights of Willow Warblers during autumn migration within Britain

Blood parasite infestation and the leukocyte profiles in adult and immature reed warblers (Acrocephalus scirpaceus) and sedge warblers (Acrocephalus schoenobaenus) during autumn migration

Haemoparasites prevalence in birds can vary among species, age and sex groups and ecological conditions. To comprehend the host–parasite assemblages, it is important to investigate physiological mechanisms underlying the interactions in wild bird species. Here, using blood smears we investigated how leukocyte profiles in reed warblers (Acrocephalus scirpaceus) and sedge warblers (Acrocephalus s...

Timing and body condition of dichromatic Black Redstarts during autumn migration

Individual variation in postjuvenile molt in male Black Redstart is pronounced with about 90% of young males retaining female-like coloration (cairei plumage type) and about 10% acquiring adult male-like feathers (paradoxus plumage type). We examined whether autumn migration timing and body condition differed between individuals of the two plumage types. We used the data of 10,977 Black Redstar...

Inferring the ecology of willow warblers during their winter moult by sequential stable isotope analyses of remiges

We present a comparison of feather stable isotope ( δ 13 C, δ 15 N) patterns representing the habitat and diet conditions for two subspecies of willow warblers Phylloscopus trochilus that breed in parapatry, but winter in diff erent regions of subSaharan Africa. Previous analyses have shown that on average winter moulted innermost primaries (P1) show subspecifi c diff erences in δ 15 N values, ...

Attraction of willow warblers to sawfly-damaged mountain birches: novel function of inducible plant defences?

Elina Mäntylä, Tero Klemola and Erkki Haukioja* Section of Ecology, Department of Biology, University of Turku, FI-20014 Turku, Finland *Correspondence: E-mail: [email protected] Abstract Plants wounded by invertebrate herbivores emit volatile compounds which invertebrate predators and parasitoids can utilize in locating herbivore prey or hosts. We studied the possibility that an analogical pheno...

Nest Success of Yellow Warblers in Willow Habitats: The Role of Surface Water and Snakes