Looking out to Lake Ontario in late March, when the ground is still thawing from winter, a daring aerialist deftly skims the water’s surface, its deep-blue iridescent feathers gleaming in the cold light. Harbingers of spring, the Tree Swallows have returned to the city. These signs of seasonal change are one of the joys of observing birdlife. Shortly following them north will be the five other species of swallow found in Toronto, many returning to their previous nesting spots.
