Citation

http://en.wikipedia.org/wiki/Prairie_dog

http://en.wikipedia.org/wiki/Black-footed_ferret

http://en.wikipedia.org/wiki/Golden_eagle

http://en.wikipedia.org/wiki/Bouteloua_dactyloides

http://www.denverpost.com/ci_20148252/hunt-oil-gas-beneath-pawnee-national-grassland-gets

Google images for "temperate grasslands"