The ability to efficiently measure the health and nutritional status of wild populations in situ is
a valuable tool, as many methods of evaluating animal physiology do not occur in real-time …

While the heterogeneity among individuals of a population is more and more documented,
questions on the paths through which it arises, particularly whether it is linked to fixed …

In a natural context, many avian species exhibit the ability to assess and balance factors
such as food availability, food quality, and energy expenditure when making foraging …

Life‐history theory predicts that investment in reproduction should decrease survival (the
'cost of reproduction'). It is often assumed that energy allocation drives such trade‐offs, with …

In birds, patterns of development of the adrenocortical response to stressors vary among
individuals, types of stressors, and species. Since there are benefits and costs of exposure …

Seasonal timing of breeding is usually considered to be triggered by endogenous
responses linked to predictive cues (eg, photoperiod) and supplementary cues that vary …

In birds, patterns of development of the adrenocortical response to stressors vary among
individuals, types of stressors, and species. Since there are benefits and costs of exposure …

The biodiversity on Earth is dramatically affected by global changes. To understand
biodiversity loss and determine priorities for conservation, it is important to assess whether …

Biparental care is a cooperative enterprise where two individuals act both independently
and in congress to rear their offspring. Historically, literature has focused on the conflicts that …

Energy is a temporally and spatially limited resource, often regarded as the currency or the
“fire of life”. In highly seasonal environments with fluctuating food availability and climatic …