Migratory birds regularly perform impressive long-distance flights, which are timed relative to
the anticipated environmental resources at destination areas that can be several thousand …

In birds, accumulating energy is far slower than spending energy during flight. During
migration, birds spend, therefore, most of the time at stopover refueling energy used during …

In 2007, the first miniature light-level geolocators were deployed on small landbirds,
revolutionizing the study of migration. In this paper, we review studies that have used …

Technological innovations have led to exciting fast-moving developments in science. Today,
we are living in a technology-driven era of biological discovery. Consequently, tracking …

Aim Knowledge of broad‐scale biogeographical patterns of animal migration is important for
understanding ecological drivers of migratory behaviours. Here, we present a flyway‐scale …

Costs of migration, in terms of time, energy, and mortality risk, have a strong theoretical and
empirical foundation in the study of birds. We expect these costs to be most severe for …

Background Over the past decade, the miniaturisation of animal borne tags such as
geolocators and GPS-transmitters has revolutionized our knowledge of the whereabouts of …

Contemporary tracking studies reveal that low migratory connectivity between breeding and
non-breeding ranges is common in migrant landbirds. It is unclear, however, how internal …

The temporal and spatial organization of the annual cycle according to local conditions is of
crucial importance for individuals' fitness. Moreover, which sites and when particular sites …

This review covers 40 years of migration studies of the Swiss Ornithological Institute with the
tracking radar “Superfledermaus”. Since 1968, this pencil-beam radar was—according to its …