Neotropical Migratory Birds

A Future for Neotropical Migratory Birds

The ecology of Neotropical migratory birds has attracted considerable attention following the documentation of continent-wide declines in many migratory species. Whereas most of this attention was initially directed toward breeding-ground events in North America, a number of studies of migrants during the non-breeding season have focused on habitat-specific, demographic, and site fidelity data to assess habitat preferences of overwintering migrants on their Central American and Caribbean wintering grounds. Other researchers pursued studies of birds during migration, and especially events at key migratory stopover sites.

To fully understand what factors determine population size for a species, we need to build detailed models of the full annual cycle of a focal migratory species. These models require habitat- and age-specific data from the breeding grounds, overwintering sites, and both spring and fall migrations. When data from a single species can be pooled together, we can identify where in the annual cycle managers can best impact a species so as to target population recovery and conservation efforts.

At the National Aviary, we have selected the Louisiana Waterthrush (Parkesia motacilla) as our focal species and completed more than 10 years of fieldwork on both the breeding and wintering grounds. The waterthrush – the only stream-dependent songbird in eastern North America – is also a forest-interior specialist and occupies linear territories along headwater streams where it depends primarily on aquatic macroinvertebrates for food. Waterthrushes have been suggested as an important indicator of the ecological integrity of these forested riparian ecosystems. The Louisiana Waterthrush is considered a species of conservation concern and is listed as a priority species for several Bird Conservation Regions because of its dependence on a specialized habitat threatened by a number of environmental stressors.

 

Research on Neotropical Birds Applied Conservation Education & Capacity Building

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