http://en.wikipedia.org/wiki/Red-tailed_hawk

http://animals.nationalgeographic.com/animals/birds/red-tailed-hawk.html

http://www.desertusa.com/aug96/du_hawk.html

http://www.answers.com/topic/red-tailed-hawk

http://www.allaboutbirds.org/guide/Red-tailed_Hawk/id

http://www.arcytech.org/java/population/facts_hawks.html

http://www.avianweb.com/redtailedhawks.html

http://identify.whatbird.com/obj/41/_/Red-tailed_Hawk.aspx

http://www.birds.cornell.edu/BOW/rethaw/

http://www.fcps.edu/islandcreekes/ecology/red-tailed_hawk.htm