lai'tjer settlements, and the Aleutian 

 ground squirrel, a colony-livintr 

 animal, was introduced from the 

 mainland to Unalaska, Umnak, and 

 Kavalga. 



Sea mammals abound in the 

 waters around the Aleutians. The 

 remnant of a once-abundant herd 

 of sea otters, w^hose pelts the Rus- 

 sians prized, is now slowdy rebuild- 

 ing under Fish and Wildlife Serv- 

 ice protection. The seals are 

 represented by the northwest har- 

 bor seal (the commonest), and the 



rare bearded seal. Various species 

 of whales frequent Bering Sea, in- 

 cluding the killer whale, w^hich 

 travels in packs and preys on fur- 

 seal pups. Dolphins are present 

 also, and there are cod, Atka mack- 

 erel, halibut, capelin, and the sand 

 lance. 



In addition to Dolly Varden 

 trout, some salmon are found in the 

 Aleutians, though generally not in 

 great abundance. There are also 

 bullheads, or sculpins, and the 

 three-spined stickleback. 



PRIBILOF ISLANDS 



N-,^ 



About 200 miles north of the 

 Aleutians lie the mist-shrouded 

 Pribilofs on whose boulder-strewn 

 beaches and rocky ledges the fur 

 seals breed. The Pribilof group, 

 volcanic in origin, contains five 

 islands, of which St. Paul and St. 

 George are the largest. The others 

 are Otter Island, Walrus Island, 

 and Sea Lion Rock — the last two 

 hardly more than reefs above the 

 wash of the sea. The temperature 



range on these islands is slight : 

 in summer the thermometer seldom 

 registers more than 50° F. and in 

 winter the range is usually between 

 20° F. and 25° F. Precipitation is 

 heavy, and mostly in the form of 

 a drizzle or light snow. In sum- 

 mer chilly fogs are almost constant ; 

 at other seasons of the year the 

 winds are violent ; and in winter the 

 Arctic pack ice sometimes closes in 

 alons: the shore. 



