300 Willett, Birds of Forrester Island. [july 



Rissa tridactyla pollicaris. Pacific Kittiwake. — Common before 

 June 10 and after August 10. Immature birds in the majority. 



Larus glaucescens. Glaucous-winged Gull. — Estimated numbers. 

 Nesting birds, 3000 pairs; immatures, 10,000 (this does not count young 

 raised this year). This species was nesting scatteringly along nearly the 

 whole coast of the main island and there were substantial colonies on 

 Petrel Island and adjoining rocks and on Cape Horn and Sea Lion rocks. 

 They began laying the first week in June and by the middle of the month 

 the nesting season was at its height. On August 13 large young were the 

 rule, although a few nests containing eggs were noted on that date. The 

 young birds depend a great deal on protective coloration for concealment. 

 On the approach of an intruder they lie absolutely motionless among the 

 rocks and, so perfectly do their colors blend into the gray of the rocks,' 

 very frequently escape detection. One youngster, yet unable to fly, fell 

 from a cliff into the water below. Here he was joined by one of his parents 

 who guided him to a sloping rock and assisted him to land. 



Larus argentatus. Herring Gull. — Although this gull has not been 

 previously reported from the reservation, it was found to be fairly common, 

 especially around the rocks at the north end. The immature birds out- 

 numbered the adults, however, at least ten to one. The only place the 

 species was found nesting was on Cape Horn Rocks, where two nests, each 

 containing two eggs, were noted on June 22, the birds being flushed and 

 positively identified in both instances. A few days later these eggs had 

 disappeared, probably having been taken by the natives. It was impossible 

 to estimate the number of herring gulls breeding as their nests could not be 

 differentiated with certainty from those of the last species. From the 

 number of adults noted, the nesting birds probably number about twenty 

 pairs. Immature birds estimated at 400. Total 440. 



Diomedea nigripes. Black-footed Albatross. — One bird seen near 

 Lowrie Island August 3. I was on a launch at the time and, heading 

 directly toward the bird, succeeded in approaching within fifty feet before 

 it took alarm and flew away, pursued for a short distance by two gulls. 



Puffinus griseus. Sooty Shearwater. — Seen occasionally through- 

 out the summer, generally a half mile or more off shore but on one occasion 

 between Forrester and Lowrie islands. 



Fulmarus glacialis glupischa. Pacific Fulmar. — Frequently seen 

 at a little distance from shore during late July and August. All birds 

 noted were in dark plumage. 



Oceanodroma furcata. Forked-tailed Petrel. — Probably 10,000 

 pairs nesting on Petrel Island, seemingly the only place on the reservation 

 where petrels nest. O. furcata is outnumbered by the next species at least 

 five to one. Their nesting localities are practically identical, though 

 furcata seems slightly more partial to the grass covered slopes than to the 

 more open ground among the timber. O. furcata also nests considerably 

 earlier than the next, eggs being found most plentifully June 5 to 15. 



The night of June 10 was spent on Petrel Island. From 10.30 p. m. 



