440 THE MAMMALS 



The grizzly bears are also found in the park, but are not bears to be 

 fooled with, for they are quite dangerous. Fortunately, they stay away 

 from people and are seldom seen along the highways or in the camps. 

 They get their name from a silver ring that is found around each hair 

 that gives them a grizzled appearance. 



The Aquatic Carnivores. Like the whales, this is another group that 

 is modified for life in the water, although they may spend considerable 

 time out of the water. Fish provide the main item of their diet. They 

 are masters at diving and swimming under water. The sea lions are the 

 most commonly seen of the group. No zoo of any size is complete 

 without a sea-lion pool, where these interesting creatures seem to get 

 great enjoyment in showing off for the crowds. The trained sea lions 



Courtesy Chicago Natural History Museum 



Fig. 28.16. Pacific walrus group. These large aquatic carnivores are found in the 



arctic regions of the Pacific. 



of the circus show that they are experts at balance and can be taught to 

 do many intricate tricks if the keepers' supply of fish holds out. The 

 walruses are larger than the sea lions and live primarily in arctic regions. 

 They are distinguished by their mustaches and the large tusk-like canine 

 teeth that protrude from their upper jaws. The seals are also found in 

 cold climates, but are well known as the source of seal-skin coats. 



Order — Ungulata 



Members of this order are characterized by the highly developed 

 grinding teeth in their jaws, which is an adaptation to their herbivorous 

 diet ; and the presence of hoofs. Most of them stand on the tips of their 

 toes with their heels never touching the ground. This makes it appear 

 as if they have three joints in the legs rather than the two found in other 



