Migrating Songbirds Neotropical migratory birds nest in the US and Canada and spend the winter south in Mexico, Central, and South America, and the Caribbean. This diverse group of birds numbers 350 species, including waterfowl, shorebirds, birds of prey, and songbirds. Migratory birds are part of a global system that developed over thousands of years. Birds play important roles in maintaining ecosystems by keeping populations of insects and other prey in balance, spreading seeds, and providing food for predators. Habitat loss is the greatest problem facing Neotropical migratory songbirds and other wildlife.
Many species construct open cup nests.
These nests are vulnerable to blue jays, raccoons, house cats, and other predators. Songbirds often nest only once during each breeding season. Riparian habitats are found on the dges of water courses, such as streams, rivers, and lakes. These habitats are vital in supporting plant and animal life. In the dry climate of the western US, riparian habitat is especially critical for nesting songbirds.