It won’t be long before North America’s largest swallows, Purple Martins, will be looking for places to nest. They’ll be arriving from as far away as Venezuela and Brazil. In eastern North America, where most martins breed, they nest almost exclusively in human-made houses - like the one pictured here. In the West, they also raise their young in natural cavities and woodpecker holes. Providing housing is important because Purple Martins are decreasing significantly in some regions.
Broadcast on Saturday, February 22, 2014 at 8:58 a.m.