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 …

Our understanding of migratory birds' year‐round ecology and evolution remains patchy
despite recent fundamental advances. Periodic reviews focus future research and inform …

456 Richard L. Hutto tridge, 1978, for a similar perspective). For the purposes of this report, a
habitat will be defined as a spatially contiguous vegetation type that appears more or less …

This study investigates, on a continent-wide scale, which environmental factors associate
with the distributional boundaries of wintering North American avifauna. Distribution and …

Local concentrations of migrating, fat-depleted birds with similar diets can lead to increased
competition for food at a time when energy demand is high. Results of a predator-exclosure …

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 …

Commentary 1282[Auk, Vol. 122 al. 2002, Tankersley and Orvis 2003). Given that migration
may constitute the most vulnerable and unpredictable period of the annual cycle (Moore …

The conservation of long-distance migratory songbirds is complicated by their life-history
characteristics and the spatial scales that they traverse. Events during migratory stopovers …

Aim Avian migration strategies balance the costs and benefits of annual movements
between breeding and wintering grounds. If similar constraints affect a large numbers of …

The relative importance of cottonwood‐willow riparian corridors and isolated oases to land
birds migrating across southeastern Arizona was evaluated during four spring migrations …