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Comparing Migrations Why Do Rufous Hummingbirds Seem Far Ahead? This map shows when the leading edge (first birds) of the Rufous and Ruby-throat migrations normally reaches certain locations. When does each migration usually enter this country from Mexico? When does each migration usually reach the Canadian border? Does this year seem like a normal year so far? This Season Teachers Kids Orientation Registration Search Copyright 1997-2008 Journey North. All Rights Reserved. Questions or comments? Contact us.