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Warblers and Caterpillars

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Warblers and Caterpillars. Warblers feed on caterpillars. However, because of ... Eventually, there will be no warblers to keep the caterpillars in check. ... – PowerPoint PPT presentation

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Title: Warblers and Caterpillars


1
Warblers and Caterpillars
  • Warblers feed on caterpillars. However, because
    of temperature changes, the birds are moving
    north to stay in their normal temperature range.
    The caterpillars are not. Eventually, there will
    be no warblers to keep the caterpillars in check.
  • (Rising Temperatures Spur Biological Chaos)

2
Ediths Checkerspot Butterfly
  • The plants that these butterflies lay their eggs
    on are drying up before the caterpillars hatch.
  • This leaves no food for the caterpillars to eat
    once they emerge from their eggs.
  • (Tangley)

3
Polar Bears
  • Polar bears hunt seals by stalking them on the
    ice. The ice is melting, giving them less time
    to hunt.
  • Bears today weigh less and give birth to fewer
    cubs than they did 20 years ago.
  • For every week earlier that the ice breaks up
    sooner, polar bears are an average of 22 lbs.
    lighter.
  • (Tangley)
  • Back to Student 10
  • Home
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