Create your own food chain.http://www.vtaide.com/png/foodchains.htm
Calculate your ecological footprint.http://www.royalsaskmuseum.ca/gallery/life_sciences/footprint_mx_2005.swf
Canadian endangered species.http://www.cbin.ec.gc.ca/index.cfm?lang=e
US endangered species.http://www.endangeredspecie.com/
Build your own food web.http://www.harcourtschool.com/activity/food/food_menu.html
Food webs vs. chains.http://www.sciencebob.com/lab/web-chainprint.html
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