150 The Wilson Bulletin — No. 80. 



Circus Imdsonius. — Marsli Hawk. 



During the greater part of the 1910 study time there were one 

 or two of these hawks to he seen flying leisurely around at almost 

 any time, but beginning on August 27, when thirteen were seen 

 migrating, there AA-as a decided increase and nearly every day evi- 

 dences of a southward movement. It is altogether likely that there 

 was at least one breeding pair on the island during this summer, 

 but there must certainly have been an influx from the northward 

 of many individuals as the weather turned colder in the last week 

 of August and the first of September. The only evidence we had 

 that this hawk might sometimes prey upon the young terns was 

 the war-like attitude of the terns when one of them appeared in 

 their vicinity. This attitude might have been a general one toward 

 any hawk-like bird, however. 

 Accipiter velox. — Sharp-shinned Hawk. 



A single individual of this species was seen on August 6th, and 

 from one to three each day thereafter, except August 27, when 

 there w-ere six, and September 2, when there were twenty-two, evi- 

 dently migrating. It is altogether likely that the depredations 

 made upon the shore birds, in particular Baird's Sandpiper, were 

 by this hawk. We were never able to catch one in the act, but on 

 numerou«! occasions one was seen to leave the vicinity of freshly 

 killed birds. One or two individuals could be started out of the 

 cedars in the morning and in the evening. 

 Astur atficapillus atricapilliis. — Goshawk. 



An individual visited the Finishing Point swamp on August 24, 

 1910. We were clearly too early to witness any decided migration. 

 Residents of the island mentioned flights of hawks which they 

 were sure were of this species. 

 Buteo horeaUs 'borealis. — Red-tailed Hawk. 



Two were found in the vicinity of large woods inland, but none 

 ever made a visit to the vicinity of the point. These two birds 

 acted like nesting birds. 

 Buteo Uneatus lineatus. — Red-shouldered Hawk. 



Individiials were occasionally seen flying high over the woods 

 in the vicinity of the swamp near camp. 

 Halkeetus leucocephalus leucocaphalns. — Bald Eagle. 



Two nests were found, one about a mile north of South Bay, 

 and one In the vicinity of Saw Mill Point. As near as we could 

 estimate there were probably eight individuals on the island. Oc- 

 casionally one or two would pay a visit to the point, but they 

 always kept well up in the air. The residents of the island shot 

 them with impunity, yet the big birds seemed to be able to main- 

 tain their numbers from year to year. 



