Further Reading

S. Milius. “Lead poisoning stymies condor recovery.” Science News. June 26, 2012.

J. Raloff. “Condor chicks hatch in zoo and wild.” Science News. Vol. 159, June 30, 2001, p. 406.

J. Raloff. “Last wild condor caught.” Science News. Vol. 131, April 25, 1987, p. 263.

E. Sohn. “Bald eagles forever.” Science News for Kids. March 20, 2006.