This
Year's Rubythroat Migration
Early, Late, or About the Same?
Is
this year's ruby-throated hummingbird migration ahead of, behind, or
about the same as it was in 2007 and 2008? You be the judge!
March
22, 2007
March
20, 2008
March
19, 2009
Directions
1.
Clickon each map to see a larger one. 2.
Lookat
the most northern sighting on each map. 3. Look
at the overall leading (northern) edge of the migration on each map.
Journal
Questions
What differences
do you notice between the migrations from year to year?
Does this
year's migration appear to be ahead of, behind, or about the same as
the 2007 and 2008 migrations?
What factors
do you think might influence the timing and pace of the migration? (Stay
tuned in the weeks to come!)
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