Hummingbirds
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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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