| stable isotope analysis provides new information on winter habitat use of declining avian migrants that is relevant to their conservation. | winter habitat use and the magnitude of migratory connectivity are important parameters when assessing drivers of the marked declines in avian migrants. such information is unavailable for most species. we use a stable isotope approach to assess these factors for three declining african-eurasian migrants whose winter ecology is poorly known: wood warbler phylloscopus sibilatrix, house martin delichon urbicum and common swift apus apus. spatially segregated breeding wood warbler populations (samp ... | 2012 | 22496827 |
| rodent-avoidance, topography and forest structure shape territory selection of a forest bird. | understanding the factors underlying habitat selection is important in ecological and evolutionary contexts, and crucial for developing targeted conservation action in threatened species. however, the key factors associated to habitat selection often remain poorly known. we evaluated hypotheses related to abiotic and biotic factors thought to affect territory selection of the wood warbler phylloscopus sibilatrix, a passerine living in an unpredictable environment owing to irregular rodent outbre ... | 2016 | 27160928 |
| reproductive performance of a declining forest passerine in relation to environmental and social factors: implications for species conservation. | identifying factors influencing a species' ecological niche and demography is a prerequisite for species conservation. however, our understanding of the interplay between demographic rates and biotic/abiotic factors is still poor for most species of conservation concern. we evaluated relevance of eight hypotheses relating to timing of breeding, temporal nest exposure, nest concealment, topography, tree structure, predation risk and disturbance, density dependence and weather for explaining varia ... | 2015 | 26172954 |
| the influence of wind direction on the capture of the wood warbler (phylloscopus sibilatrix), an uncommon migratory species in the western mediterranean. | the wood warbler (phylloscopus sibilatrix) is a migratory species in the western mediterranean wintering in the gulf of guinea region, west africa. in autumn and spring, this species, along with the populations breeding in ireland and britain, uses the italian peninsula as its main axis of migration. from the data of captured birds at several ringing stations in the western mediterranean (balearic islands and coastal iberian peninsula), we analyzed capture rates of the species during spring migr ... | 2011 | 21604153 |
| no evidence for illegitimate young in monogamous and polygynous warblers. | in animals with internal fertilization, paternity is uncertain. in birds, the occurrence of copulations outside the pair-bond has been documented in a number of species, but the extent to which these result in illegitimate young is largely unknown, and constitutes a major deficiency in our understanding of avian mating systems. the analysis of tandemly repeated sequences (minisatellites), has enhanced our ability to make individual identifications and paternity determinations. here we describe t ... | 1990 | 2296308 |
| predator recognition and differential behavioural responses of adult wood warblers phylloscopus sibilatrix. | birds often engage in nest defence against predators to improve breeding success, but defence efficiency requires the capability to assess the threat level posed by potential predators. for species with low breeding-site tenacity, which may encounter varying occurrence and density of predators in different areas, threat recognition could be compromised due to naivety, and so predator recognition may focus on broad key features to diminish the risk of misidentification. we experimentally tested t ... | 2018 | 29375193 |
| patterns of haemoproteus majoris (haemosporida, haemoproteidae) megalomeront development. | blood parasites of the genus haemoproteus (haemosporida, haemoproteidae) are cosmopolitan and prevalent in birds. numerous species and lineages of these pathogens have been identified. some of the infections are lethal in avian hosts mainly due to damage of organs by tissue stages, which remain insufficiently investigated. several closely related lineages of haemoproteus majoris, a common parasite of passeriform birds, have been identified. one recent study described megalomeronts of unique morp ... | 2020 | 32956638 |
| numerical response of mammalian carnivores to rodents affects bird reproduction in temperate forests: a case of apparent competition? | resource pulses such as mast seeding in temperate forests may affect interspecific interactions over multiple trophic levels and link different seed and nonseed consumers directly via predation or indirectly via shared predators. however, the nature and strength of interactions among species remain unknown for most resource pulse-driven ecosystems. we considered five hypotheses concerning the influence of resource pulses on the interactions between rodents, predators, and bird reproduction with ... | 2018 | 30598759 |
| a new blood parasite of leaf warblers: molecular characterization, phylogenetic relationships, description and identification of vectors. | blood parasites of the genus haemoproteus kruse, 1890 are cosmopolitan, might be responsible for mortality in non-adapted birds, and often kill blood-sucking insects. however, this group remains insufficiently investigated in the wild. this is particularly true for the parasites of leaf warblers of the phylloscopidae alström, ericson, olsson & sundberg the common small old world passerine birds whose haemoproteid parasite diversity and vectors remain poorly studied. this study reports a new spec ... | 2018 | 30286800 |