Summary:
- Birds live and breed in most terrestrial habitats on all seven continents.
- They occupy a wide range of ecological positions.
- Human actions have caused the extinction of hundreds of species of birds.
- 1,200 species are threatened with extinction by human actions.
- Humans need to take steps to protect this precious and important natural resource.
- What can you do to help?
- Share your story and photos with CNN iReport.
- Back to the page you came from.
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