From now into autumn, untold millions of birds that nested throughout North America will be migrating southward to their wintering grounds.  In fact, approximately 75 percent of the birds that nest across the length and breadth of the continent migrate.

       Some of the migrants that nest in our backyards include the gray catbird, orchard oriole, Baltimore oriole, barn swallow, tree swallow, chimney swift, summer tanager, great crested flycatcher, wood thrush, and ruby-throated hummingbird.