1909] The 1907 Alexander Alaska Expedition. 191 
Larus philadelphia (Ord). Bonaparte Gull. 
At Windfall Harbor, Admiralty Island, Bonaparte gulls be- 
gan to arrive in large flocks, April 29. They remained more or 
less common well into May, feeding in flocks of a hundred or 
more on the shallow water close to shore, where small fish were 
plentiful. The full-plumaged adults were first to appear, and 
a few days later the immatures arrived. A few immatures were 
noted by Stephens at Mole Harbor in May. Not until July 23 
at Idaho Inlet, Chichagof Island, was the species again seen. 
Dixon noted a large flock there, and also found it common at 
Port Frederick July 25 to August 1, and at Hawk Inlet, Ad- 
miralty Island, August 1 to 9. Stephens noted a considerable 
flock frequenting the mud flat at the head of Rodman Bay, 
Baranof Island, August 12 to 20. 
Ten skins of the Bonaparte gull were preserved (Nos. 62-68, 
46-48). 
Sterna paradisaea Briinnich. Arctic Tern. 
This, the only species of tern detected by the expedition, 
proved to be rather common on Glacier Bay, in the vicinity of 
which it may have been nesting. A full-grown juvenal was taken 
there July 10 (No. 89), and adults June 28 and July 11 (Nos. 
87, 88, 90). A large flock kept at the mouth of a creek near the 
eastern mainland camp, where they seemed to be feeding on 
salmon fry. 
Phalacrocorax pelagicus Pallas. Pelagic Cormorant. 
At Windfall Harbor, Admiralty Island, April 17 to May 19, 
several pelagic cormorants stayed around a reef, covered at high 
tide, a half mile or so off shore. At Mole Harbor the same was 
true, May 19 to June 10. At Idaho Inlet, Chichagof Island, 
July 20 to 25, a few were seen. In Glacier Bay the species was 
much more numerous, being noted commonly fishing among the 
icebergs. On South Marble Island, July 5, Dixon’s notebook 
records that ‘‘there were two colonies of pelagic cormorants, one 
of breeding birds, the other of non-breeders. There were at 
least a hundred cormorants breeding on the island, and from 
