A major aim of bird ringing is to provide information about the migration and movements of
bird populations. However, in comparison with demographic studies, little research has …

Background Some parasites use olfactory cues to detect their hosts and, since bacterial
symbionts are partially responsible for animal odours, they could influence host parasitism …

Rationale Many insect species undertake multigenerational migrations in the Afro‐tropical
and Palearctic ranges, and understanding their migratory connectivity remains challenging …

Stable isotope analyses are a powerful tool in understanding diets, defining trophic
networks, inferring geographical origins of animals and in forensic tracing of the origins of …

Wood Warblers Phylloscopus sibilatrix have declined considerably throughout most of their
north and western breeding range in Europe but the causes of this decline are unknown …

Despite recent advances in technology, it remains difficult to connect breeding and non‐
breeding areas of populations of migratory organisms due to the challenges of year‐round …

Hydrogen stable isotopes (δ2H) in feathers are used to determine the origin and migration
strategy of birds. To identify the geographic location of the site of feather synthesis …

Molecular methods have revealed that symbiotic systems involving bacteria are mostly
based on whole bacterial communities. Bacterial diversity in hoopoe uropygial gland …

The uropygial gland of hoopoe nestlings and nesting females hosts bacterial symbionts that
cause changes in the characteristics of its secretion, including an increase of its …

Nest re‐use in birds has the potential cost of infection by parasites and pathogens but may
also be a source of beneficial symbiotic bacteria transmitted horizontally. Eurasian hoopoes …