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	Home : Biological Science : Plants Animals and The Environment : Ecology and The Environment : North American Habitats and Extinction Issues LINKS: American Rivers- A Mass Extinction of Freshwater Species Aquatic animals are the most threatened on the planet. Links to many sites by region. http://www.americanrivers.org/fishwildlife/fwextinction.htm (Added: Sun Jan 27 2002) Amphibian Checklist and Identification Guide From the USGS: The North American Reporting Center for Amphibian Malformations. http://www.npwrc.usgs.gov/narcam/idguide/ (Added: Sun Jan 27 2002) Toward a Land Use History of North America: A context for understanding environmental change. http://www.cpluhna.nau.edu/Introduction/context.htm (Added: Sun Jan 27 2002)
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