Early‐life conditions can have long‐lasting effects and organisms that experience a poor
start in life are often expected to age at a faster rate. Alternatively, individuals raised in high …

Telomere length (TL) is increasingly being used as a biomarker of senescence, but
measuring telomeres remains a challenge. Within tissue samples, TL varies between cells …

Light-level geolocators, miniature devices used for tracking avian migration over the full
annual cycle, are being widely deployed on small migratory passerines. However, the …

In wild vertebrates, young parents are less likely to successfully rear offspring relative to
older ones because of lower parental skills ('the constraint hypothesis'), lower parental …

Tracking small passerines using miniaturized location tags is a rapidly expanding field of
study. In a 1‐year study, we tested whether there were any short‐or longer‐term effects of …

The recent boost in bird migration studies following the development of various tracking
devices raised awareness of how detrimental attaching devices can be for animals. Such …

Biotelemetry devices provide unprecedented insights into the spatial behaviour and ecology
of many animals. Quantifying the potential effects of attaching such devices to animals is …

Evidence that telomere length (TL) and dynamics can be interpreted as proxy for 'life stress'
experienced by individuals stems largely from correlational studies. We tested for effects of …

Background Rapid improvements in inexpensive, low-power, movement and environmental
sensors have sparked a revolution in animal behavior research by enabling the creation of …

Wild birds differ in size according to their age and sex, adult birds being larger than
juveniles. In the galliforms, males are larger than females, in contrast to some groups, such …