Geographic Threatened And Endangered Species

Figure 9

The U.S. Fish and Wildlife Service lists more than 1,200 species of animals and plants as being at risk in the United States. Of these, about 20 percent are classified as threatened and 80 percent as endangered.

VERNAL POOL TADPOLE SHRIMP This endangered species lives in the seasonal freshwater ponds of California's Central Valley. Pollution, urban sprawl,and other forces have destroyed 90 percent of the vernal pools in the valley. Loss of habitat makes the survival of these tiny creatures highly uncertain.

CALIFORNIA CONDOR The endangered condor came close to extinction at the end of the twentieth century.Some condors have been raised in captivity and successfully released into the wild.

The Most Endangered Threatened Species Endangered Plants The World

HALEAKALA SILVERSWORD One of the world's most spectacular plants,this threatened species is making a recov-ery.The plant shown here is blooming in Hawaii's Haleakala (ha lee ah kuh LAH) crater.

DESERT TORTOISE The future of the threatened desert tortoise is uncer-tain.Human development is eroding tortoise habitat in the southwestern United States.

132 ♦ E CHAPTER 5 Conserving Life

SOUTHERN SEA OTTER The threatened sea otter lives in shallow waters along the Pacific coast of the United States. For centuries,sea otters were hunted for their fur.

(tl)Joel Sartore, (tr)William H. Amos, (c)Joseph Van Wormer/Bruce Coleman, Inc./PictureQuest, *

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