of movement through Bering Strait is probably a result of hydrographic 
conditions which bring about the breakup of the western side of the Strait 
earlier than the eastern side, It seems likely to Fay (1955) that the 
earliest group through the Bering Strait is from Siberian waters and that 
the later group on the eastern side comes from Alaskan waters. According 
to Brooks (1954), the first animals appearing at King Island, Diomede, 
and Wales are juveniles, and adult females with young. They are followed 
later by a mixture of adults and immatures of both sexes, and finally by 
a few old bulls. By the end of May some walruses appear as far north as 
Point Hope and Icy Cape on the Alaskan Coast. During this time two con- 
centrations of bull walruses are found, well to the south of the remaining 
herd. One of these is in the Walrus ielands in Bristol Bay; the other, in 
the Gulf of Anadyr near Kresta Bay. 
During June, the sea south and east of St. Lawrence Island 
becomes ice-free but much ice still remains along the Siberian Coast. 
The last of the migrating herds are passing both ends of St. Lawrence 
Island, thoseto the west being females for the most part, and those to 
the east and north being males. By the second week in June essentially 
all have passed King Island, and by the third week most have passed 
through eastern Bering Strait. Migration through the western side of 
Bering Strait is completed by the end of the month, although stragglers 
have been seen in the Strait during July. There is some evidence that 
the preponderance of the walrus herd migrates through the west side of 
the Strait. By the end of June large herds are reported near Wrangell 
Island and Long Strait, on the Siberian side of the Chukchi Sea, and 
occasionally large herds are seen near shore in the vicinity of Point 
Hope, Alaska. 
July and August bring the end of the northward movement in the 
Chukchi Sea. Most of the migrants, especially the females and young, 
have progressed northwestward from Bering Strait. On the Alaskan side, 
inshore records are common from Icy Cape northeastward to Barrow; most 
of the Barrow group are bulls. Ice continues to move northward and 
walruses then are seldom seen near shore. On the Siberian side, ice 
remains near shore from Kresta Bay to St. Lawrence Bay. When the ice 
finally melts, the animals move to hauling grounds on shore (Nikulin, 
1947). In Alaskan waters a group of bulls remains near the Walrus 
Islands. In earlier times, resident herds, also bulls, occupied areas 
on the Pribilof and St. Matthew Islands, and the Punuk Islands near 
St. Lawrence Island. Formerly there were hauling grounds for both sexes 
near Point Hope on the Alaskan side, which were occupied during July, 
August, and September. 
In September the northernmost records of walruses have been 
made at the edge of the ice pack. Late in September, movement to the 
south begins, and occasionally the vanguard of this southward movement 
reaches Bering Strait. During October, new ice begins to form, north of 
about 70° north latitude, and strong northerly winds tend to push the old 
ice southward. 
