This page compares human events to significant illustrations of the decline of biodiversity on earth. Each node on the timeline tells a small story of human advance and ecological decline. The last node offers a little bit of hope.

At the bottom of the timeline is a visual index showing the growth of human population.



The timeline on the Dinosaurs Alive page shows a massive extinction about 65 million years ago. We are living through a similar time, with biodiversity dropping very fast. Last time it was probably a giant asteroid slamming into the earth. This time around, it's the environmental damage done by the ever-growing human population.


Have your students research endangered birds from your area. The students can write a paper and present to the class their findings. Have the students answer the following questions:

  • What is the animal’s name?
  • What is the bird’s range?
  • What is its status in the wild?
  • Approximately, how many are left in the wild?
  • Why is it endangered?
  • What can we do to help its situation?

Have your students brainstorm ideas how they can help the bird’s situation. Have them create a project to make others aware of the plight of this species.


US Fish and Wildlife Services

Conservation on International Trade in Endangered Species of Wild Flora and Fauna

  Hunters & Hunted
  What's for Lunch?
  How's the Water
  Beaks are Tools
  Backyard Birdfeeder
  Shapes & Sizes
  Lift Off
  A Big Enough Wing
  Migration Hopscotch
  Sing Out Loud
  Virtual Incubator
  Dance of Love
  On the Egg
  Becoming a Bird
  The Big Deal: The Feather
Dead or Alive
  Are Birds Dinosaurs?

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