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Comparing Migrations Why Do Rufous Hummingbirds Seem Far Ahead? Last week (March 2007), many students asked, "How can Rufous hummingbirds be in Canada already, when Ruby-throats are still gathered in the southern United States?" Are the Rufous hummers faster or more eager? Is this just an unusual year? Let's explore! This map shows the Rufous hummer migration on March 14, 2007. Look at the leading edge (birds farthest north). Roll your mouse over the map to see the leading edge of the Ruby-throated migration on the same date. What differences do you notice?     This Season Teachers Kids Orientation Registration Search Copyright 1997-2008 Journey North. All Rights Reserved. Questions or comments? Contact us.