Global movement patterns of migratory birds illustrate their fascinating physical and
physiological abilities to cross continents and oceans. During their voyages, most birds land …

This paper advances an hypothesis that the primary adaptive driver of seasonal migration is
maintenance of site fidelity to familiar breeding locations. We argue that seasonal migration …

We describe a new collaborative network, the Motus Wildlife Tracking System (Motus;
https://motus. org), which is an international network of researchers using coordinated …

Many birds fly non-stop for days or longer, but do they sleep in flight and if so, how? It is
commonly assumed that flying birds maintain environmental awareness and aerodynamic …

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 …

The extraordinary adaptations of birds to contend with atmospheric conditions during their
migratory flights have captivated ecologists for decades. During the 21st century …

Long-distance migratory organisms are under strong selection to migrate quickly. Stopovers
demand more time than flying and are used by individuals to refuel during migration, but the …

Migratory species can experience limiting factors at different locations and during different
periods of their annual cycle. In migratory birds, these factors may even occur in different …

Migratory birds that experience poor overwintering conditions are often late to arrive at the
breeding grounds, which is known to depress individual fitness. Despite the importance of …

Body condition (ie relative mass after correcting for structural size) affects the behaviour of
migrating birds, but how body condition affects migratory performance, timing and fitness is …