lS " y I Loomis on Birds of Chester County, Sout// Carolina. QC 



by August. Fluctuations in breeding species — with marked 

 intervals of paucity — are conspicuous features of the month's 

 movements. Some of these bh'ds of the breeding season, as the 

 waves pass southward, rise in the scale of abundance, while 

 others fall far short of their former numbers. Certain species 

 that disappeared after their season of reproduction now reappear. 

 A number of new arrivals make their appearance, mostly 

 mountain breeding species, and birds whose first coming was in 

 July occur at intervals in increased abundance, and at the close 

 of the month late breeders begin to take their departure. 



I have spoken of the early migration of Northern Phalaropes 

 at Monterey Bay, California, and of a deflected movement of 

 Dark-bodied and Pink-footed Shearwaters. On the 27th of 

 June it was discovered that there was a considerable movement 

 of California Murres going on. Like the Phalaropes and Shear- 

 waters they moved rapidly southward parallel with the line of 

 the coast. Aside from the California Murres, the July move- 

 ments were confined, so far as determined by my observations, 

 chiefly to the Western Gull and Heermann's Gull. In both the 

 migration was one mainly of adult birds. The former species 

 grew less and less numerous, and immature birds began to pre- 

 ponderate at the end of the month. Two large flocks of adult 

 Heermann's Gulls, of both sexes, appeared on the 15th. They 

 were the first I had seen, except several in dark plumage. As 

 the month advanced adults rapidly increased. On the 27th I 

 wrote in my journal, "This species is the most abundant Gull on 

 the Bay. The dark phase, however, is not very plentifully 

 represented, though birds of this style are becoming more numer- 

 ous." California Murres continued to migrate south through 

 July. Some days were clays of marked migration. The first 

 female was taken on the nth. Females, however, did not 

 become numerous until August, the earlier movements being 

 apparently of males. July iS an adult female Western Sand- 

 piper was shot. On the 23d a few Wandering Tatlers appeared 

 along the shore on the rocks just beyond the reach of the surf. 

 A week later they were greatly reenforced, being generally dis- 

 tributed along the rocky shore. Their presence I attribute to 

 migration. This assumption is corroborated by the character of 

 the arrivals of the next few days. 



