Information obtained from:

1. Burleson GL 1942. "The Source of Blood Ejected From the Eyes of Horned Lizards." Copeia. 1942: 246-248.

2. Dingus, Anne. The Horny Toad. Texas Monthly. http://www.texasmonthly.com/ranch/readme/hornytoad.php?et_sp_id=1

3. Horned Lizard Conservation Society: Facts About Horned Lizards: Alias: The Horny Toad. http://www.hornedlizards.org

4. Horned Lizard. Wikipedia: The Free Encyclopedia. http://en.wikipedia.org/wiki/Horned_lizard

5. Leache, Adam D. and Jimmy A. McGuire. "Phylogenetic Relationships of Horned Lizards (Phrynosoma) Based on Nuclear and Mitochondrial Data: Evidence for a Mitochondrial Gene Tree." Molecular Phylogenetics and Evolution. Volume 39, Issue 3, June 2006, Pages 628-644.
         Also on the web at:          http://socrates.berkeley.edu/~leache/phrynosoma.html 


6. Seymour, George and A.R. Rays. Jerrold J. Feldner Desert USA: The Ultimate Desert Resource: Horned Lizards. http://www.desertusa.com/april96/du_hliz.html

7. Wade, C. Sherbrook, George A. Middendorf. "Blood Squirting Variability in Horned Lizards (Phrynosoma)." Volume 2001, Issue 4, (Dec. 2001), p. 1114-1122.

Images and media obtained from:

1. AnimalPlanet.Com. The Eyes Have It. 12/05/2006. http://www.animal.discovery.com/.../lizards/blood/eyes.html
 
2. Animal Photo Archive: Lizard. 2006 http://www.animals.timduru.org/dirlist/lizard/

3. Aqualand Pets Plus. Keeping Horny Toads (Really Horned Lizards). 2006. http://www.aqualandpetsplus.com/Lizard,%20Horned%20Toad.htm

4. Baby Roundtail Horned Lizard. 2006 http://www.geoinfo.nmt.edu/.../BabyHorned04_jpg.html

5. Great Sand Dunes National Park and Preserve. Sand Sea Wonders: A Natural History of Great Sand Dunes: Horned Lizard. 2006. http://www.nps.gov/grsa/resources/poster/horned_lizard.htm

6. Hastings Natural History Reserve. Amphibians and Reptiles. 2006. http://www.hastingsreserve.org/Herps/herps.html

7. Horned Lizard. Wikipedia: The Free Encyclopedia. http://en.wikipedia.org/wiki/Horned_lizard

8. JungleWalk.Com Round-tailed Horned Lizard Refrigerator Magnet. 12/2006. http://www.junglewalk.com/shop/Products/Round-tailed-Horned-Lizard-Magnet-1505.htm

9. Leache, Adam D. and Jimmy A. McGuire. "Phylogenetic Relationships of Horned Lizards (Phrynosoma) Based on Nuclear and Mitochondrial Data: Evidence for a Mitochondrial Gene Tree." Molecular Phylogenetics and Evolution. Volume 39, Issue 3, June 2006, Pages 628-644.
         Also on the web at:          http://socrates.berkeley.edu/~leache/phrynosoma.html

10. MiniQuest: Adventures for the Part Time Explorer: Nelson's Landing. 1999. http://www.miniquest.com/trips/nelson/nelson.html

11. Phillipsen, Ivan. Salamander Candy: Writing About Biology and Other Sweet Things. http://www.evtv1.com:80/vidsensep.asp?itemnum=1800&aid=1897&bg1=000064&bg2=DDDDDD&font=FFFFFF&linkc=FFCC00&afont=000000&

12. Ryan, Michael J. Paleoblog: Evolution. Extinction. Fossilization. (Repeat). 12/2006. http://paleoblog.blogspot.com

13. Seymour, George and A.R. Rays. Jerrold J. Feldner. Desert USA: The Ultimate Desert Resource: Horned Lizards. http://www.desertusa.com/april96/du_hliz.html

14. Sullivan, John. Phrynosoma platyrhinos: Desert Horned Lizard. 2006. http://www.wildherps.com

15. Texas's Horned Lizards. . . 02/08/2003. http://www.odessahistory.com/hliza.htm

16. ThinkQuest.org. Horned Lizard 03/31/1998. http://www.library.thinkquest.org/4222/hornedlizard.htm

17. Wade, C. Sherbrook, George A. Middendorf. "Blood Squirting Variability in Horned Lizards (Phrynosoma)." Volume 2001, Issue 4, (Dec. 2001), p. 1114-1122.

18. www.stickandboots.org/Sunset_Brookbank.html




  

a day in the life of a horny lizard [7]