We review digestion and osmoregulation in the avian gut, with an emphasis on the ways
these different functions might interact to support or constrain each other and the ways they …

During the course of their lives many vertebrates live and forage in environments
characterized by different salinities and must therefore respond to changes in salt intake …

By comparing the isotopic composition of tissues deposited at different times, we can identify
individuals that shift diets over time and individuals with constant diets. We define an …

Because a broad spectrum of resource use allows species to persist in a wide range of
habitat types, and thus permits them to occupy large geographical areas, and because …

Many migratory vertebrates typically move between habitats with varying salinities during
the annual cycle. These organisms clearly exhibit a remarkable phenotypic flexibility in their …

Elucidating forces capable of driving species diversification in the face of gene flow remains
a key goal in evolutionary biology. Song sparrows, Melospiza melodia, occur as 25 …

Tracing how free-ranging organisms interact with their environment to maintain water
balance is a difficult topic to study for logistical and methodological reasons. We use a novel …

Recent experiments on shorebirds have demonstrated that maintaining an active
osmoregulatory machinery is energetically expensive. This may, in part, explain diet and …

A persistent challenge in making associations between phenotypic and environmental
variation is understanding how ecological factors and demographic history interact to shape …

Predictions indicate that birds worldwide will be affected by global warming and extreme
climatic events which is especially relevant for passerines because the diurnal habits, small …