"Journey North Bald Eagles." Journey North Bald Eagles. N.p., n.d. Web. 20 Mar. 2016.

"Eagle Eye." Wikipedia. N.p., n.d. Web. 22 Mar. 2016.

"Facts About Eagle Eyesight: What Is Eagle Vision And How Do Hawkeye See?" ImproveEyesightHQ.com. N.p., n.d. Web. 22 Mar. 2016.

"What Is a Nictitating Membrane?" 10,000 Birds. N.p., 24 Feb. 2014. Web. 22 Mar. 2016.

"Eagle." Onekind. N.p., n.d. Web. 22 Mar. 2016

Wolchover, By Natalie. "What If Humans Had Eagle Vision?" LiveScience. TechMedia Network, 24 Feb. 2012. Web. 22 Mar. 2016.

"Vision & Eyesight: Parts of the Eye." Vision & Eyesight: Parts of the Eye. N.p., n.d. Web. 22 Mar. 2016