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