Summary: Most hummingbirds retreat south in autumn, but Anna's Hummingbirds are found in northern latitudes throughout the year. Since 1960, they've moved their year-round limit north from California to British Columbia.
Summary: Most hummingbirds retreat south in autumn, but Anna's Hummingbirds are found in northern latitudes throughout the year. Since 1960, they've moved their year-round limit north from California to British Columbia.