On the outer edges of man's environment live various wild animals that are not likely to survive under the conditions that man has imposed on their surroundings. The U.S. has 101 varieties, known collectively and officially as "endangered species." They range from the black-footed ferret, which roams the Dakotas, to Bachman's warbler, which flits through the swamps of the Southeast. In recent years, as the Government made it official policy to save these creatures from going the way of the great auk, the news of threatened extinction has slowly changed to news of...
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