Fig. 1. A male yellow-billed loon settingon eggs in nest at Wahoo Lake on July 9, 1952.
Fig. 2. Nest and eggs shown in figure1, July 9, 1952. Incubation had just begun.


Fig. 3. Arctic loon (upper) and red-throatedloon (lower) from Teshekpuk Lake, August 1, 1951.
Fig. 4. Nest and eggs of white-frontedgoose at Umiat, July 1, 1952. Incubation three fourths completed.


Fig. 5. Adult male surf scoters, July16, 1952, at Porcupine Lake. Scoters are uncommon on the Arctic Slope.
Fig. 6. Arctic tern shot at TeshekpukLake on August 1, 1951. A common breeding bird in northern Alaska.

PLATE 10


Fig. 1. Shore of Arctic Ocean at PointBarrow, June 19, 1952. Many birds already were nesting on the tundra.
Fig. 2. Tundra and oriented lakes 80mi. S Point Barrow, August 28, 1952, are breeding places for water birds.


Fig. 3. Luxuriant vegetation used bybreeding birds in intermontane valley at Porcupine Lake, July 18, 1952.
Fig. 4. Willow-lined creek at ChandlerLake, August 25, 1951. Willows and alders offer nesting sites for birds.


Fig. 5. NW face of Mt. Chamberlin,9131 ft.; terrain inhospitable to most breeding birds. August 5, 1952.
Fig. 6. Destruction of bird communitiesby caribou trampling south of Lake Peters. August 8, 1952.

Somateria spectabilis (Linnaeus): King eider.—Specimen 1: Point Barrow, 156°27'25", 71°23'11", 3 ft., No. 31306, ad. male, August 25, 1952.