A hummingbird flaps its wings 75 times per second during flight. Because flying burns so much energy, a hummingbird typically eats every 15 minutes. When hummingbirds migrate, do you think they fly over land and feed on flowers along the way? Or do they fly over open seas, where there's no place to find food or rest? This week, let's explore maps, facts and questions about the route ruby-throated hummingbirds take during their spring migration.

Photo: Russ Thompson