"The necessity of preserving our wildlife has been difficult for Americans to understand...Before the transcontinental railroad was built, sixty million buffalo roamed the plains of the United States; now barely five thousand survive, and only in protected areas."
"The slaughter of the buffalo is rivaled only by the amazingly complete extermination of the passenger pigeon, flights of which at one time 'darkened the sun for hours on end.' The Carolina paroquet, the heath hen, the Pallas cormorant, and the giant mink are among the once numerous vanished species. The grizzly bear, the California condor, and the sea otter have become rare. Many other species are fast approaching extinction."
--WPA writers, in "American Wildlife, Illustrated," New York: J.J. Little and Ives, Co., 1940.