>>305189>The extinction of the passenger pigeon is a poignant example of what happens when the interests of man clash with the interests of nature. It is believed that this species once constituted 25 to 40 per cent of the total bird population of the United States. It is estimated that there were 3 billion to 5 billion passenger pigeons at the time Europeans discovered America.>is a western prairie dog species, and the only species found on theGreat Plains. Some authorities believe the black-tailed prairie
dog may have been the most numerous of mammalian herbivores
found on the plains-with some estimates placing their historic
numbers as high as 5 billion. Due to a combination of factors
including habitat destruction, hunting, plague, and poisoning
programs, the black-tailed prairie dog may now be threatened
with extinction across its entire range. In this paper, a tentative
prairie dog conservation strategy consisting
