Where have the birds of summer gone? The Swainson's Thrush is wintering in Central or South America, maybe as far south as Bolivia.
Warbling Vireos are now spread through much of Central America, while Black-headed Grosbeaks have migrated to Mexico. This Orange-crowned Warbler also makes Mexico its winter home, as do some American Robins. January finds the Willow Flycatcher tucked away in Costa Rica or Panama.
As winter turns to spring, these singers will begin to fly north, where they will once again grace us with their rich dawn chorus.
