Populations of migratory birds are usually considered to be limited by conditions in breeding
or wintering areas, but some might be limited by conditions encountered on migration. This …

Unlike resident bird species, the population sizes of migratory species can be influenced by
conditions in more than one part of the world. Changes in the numbers of migrant birds …

We examined the indirect effects of insectivorous birds on plant growth through consumption
of leaf—chewing insects in a Missouri Ozark deciduous forest. Over a period of 2 yr, we …

1. Theoretical arguments suggest that distributions of migratory birds in winter should match
patterns of food availability, but in reality the match between migrants and their food may be …

The alteration of the timing of biological events is one of the best documented effects of
climate change, with overwhelming evidence across taxa. Many studies have investigated …

Climate change has been shown to shift the seasonal timing (ie phenology) and distribution
of species. The phenological effects of climate change on living organisms have often been …

Many species of Nearctic landbirds exhibit behavioral plasticity during migration,
presumably to compensate for energetic demands of migratory flight. At Block Island, Rhode …

The phenomenon of bird migration has fascinated people from time immemorial. The
arrivals and departures of different species marked the seasons, heralding spring and …

Experimental work has established that vertebrates can have a large impact on the
abundance of arthropods in temperate forest and grasslands, as well as on tropical islands …

Change in body mass is an important measurement in many studies addressing changes in
energy stores or condition. Usually, change in body mass is measured in birds caught twice …