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Think and Discuss!
These maps show 2 weather factors on
the days when many ruby-throated hummingbirds headed west in Canada:
1.) wind movement and 2.) a forecast of how temperatures would differ from normal.
Look
today's rubythroat map
and then look at these maps. (Click for larger images.)
What may have affected rubythroat migration in Canada this week?
Wind Map (May 12, 2008)
How Temperatures Differed from Normal (Forecast: May 12-19, 2008)
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