By Dorothy Janick
Every spring, hundreds of millions of birds migrate north across the United States, returning to their breeding grounds after spending the winter in warmer southern regions. For most species, spring migration begins in early March and continues through mid-June. Many birds are already on the move, but peak migration is still ahead, as illustrated by this map. The map, developed by BirdCast in partnership with the Cornell Lab of Ornithology and Colorado State University, depicts the average peak migration periods for different regions in the United States, based on historical data dating back to 1995.
In addition to these seasonal peak migration maps, BirdCast also offers live bird migration maps that display real-time migration activity based on data from the US weather surveillance radar network, as well as daily bird migration forecast maps that predict nocturnal migration patterns. These maps are valuable for conservationists who can use the forecasts to mitigate hazards, like light pollution, that could disrupt the birds’ journeys, and they are also valuable for birders eager to track and witness the migratory spectacle. With peak migration still on the horizon, there’s plenty of time to head outside and experience the wonder of spring migration for yourself!