credits

http://www.thewildclassroom.com/biomes/grasslands.html 

http://www.inhs.illinois.edu/resources/annualreports/99_00/biod.html

http://sala.lab.asu.edu/wordpress/wp-content/uploads/091-sala.pdf

https://php.radford.edu/~swoodwar/biomes/?page_id=173

http://biology.about.com/od/landbiomes/a/aa042106a.htm

http://www.gould.edu.au/foodwebs/australia.htm


http://www.wildanimalplanet.com/prairie.html

http://apps3.fao.org/wiews/Prague/Paper7.jsp