Variation in survivorship of a migratory songbird throughout its annual cycle

Summary Demographic data from both breeding and non‐breeding periods are needed to manage populations of migratory birds, many of which are declining in abundance and are of conservation concern. Although habitat associations, and to a lesser extent, reproductive biology, are known for many migratory species, few studies have measured survival rates of these birds at different parts of their annual cycle. Cormack–Jolly–Seber models and Akaike’s information criterion model selection were used to investigate seasonal variation in survival of a Nearctic – Neotropical migrant songbird, the black‐throated blue warbler, Dendroica caerulescens . Seasonal and annual survival were estimated from resightings of…

• NS
  National Science Foundation