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Compare Landmass
Find the breeding gounds and wintering grounds for Ruby-throated and Rufous Hummingbirds. Notice how comparatively little land is available to hummers in the winter. Think about these questions:
  • Why don't birds stay "down south" all year?
  • Why is a larger breeding range helpful to birds?
  • Why is habitat loss in the winter range especially significant to migratory birds?

Range map: Ruby-throated and Rufous Hummingbirds