Despite being a prominent aspect of animal life, sleep and its functions remain poorly
understood. As with any biological process, the functions of sleep can only be fully …

Stopovers comprise a significant proportion of the time that many birds spend migrating, and
researchers have long relied on these events to define and classify broader migratory …

Light‐level geolocator tags use ambient light recordings to estimate the whereabouts of an
individual over the time it carried the device. Over the past decade, these tags have …

Although the migration ecology of birds breeding in the Neotropics is still poorly studied
relative to that of their counterparts breeding at north-temperate latitudes, studies conducted …

In many taxa, the most common form of sex-biased migration timing is protandry—the earlier
arrival of males at breeding areas. Here we test this concept across the annual cycle of long …

Faster migration in spring than in autumn seems to be a common pattern in birds. This has
been ultimately explained by seasonally different selection pressures. Variation in migration …

Several factors affect the flight altitude of migratory birds, such as topography, ambient
temperature, wind conditions, air humidity, predation avoidance, landmark orientation, and …

Sleep is fundamental to the health and fitness of all animals. The physiological importance
of sleep is underscored by the central role of homeostasis in determining sleep investment …

Background Biologgers have contributed greatly to studies of animal movement, behaviours
and physiology. Accelerometers, among the various on-board sensors of biologgers, have …

Tracking technologies have widely expanded our understanding of bird migration routes,
destinations and underlying strategies. However, determining the entire trajectory of small …