ART. 12 BIRDS OF ST. LAWRENCE ISLAND — FRIEDMANN 7 



The photographs illustrating this paper (pis. 1-6) are all by Mr. 

 Collins. 



Family GAVIIDAE, Loons 



GAVIA ADAMSI (Gray) 



Yexlow-billed Loon 



Colymhus adamsi Gray, Proc. Zool. Soc. London, 1859, p. 167 (Russian America 



tlirough Bering Straits=AIa?ka). 

 Gacia adamsi, Bailey, Condor, vol. 27, p. 26, 1925. 



Collins collected two adult specimens in good summer plumage. 

 Unfortunately neither was sexed or dated. Both were taken at 

 Gambell, in the northwestern part of the island. Bailee' saw one 

 near the old village of Kookooluk (Kukuliak) on June 28, the only 

 previous record for St. Lawrence. It is not known whether it breeds 

 there. 



This species is said to be a late-nesting bird. It is all the more 

 unfortunate that the present two specimens are without dates, as 

 they may be migrants or may have been late enough to have been 

 breeding on St. Lawrence. 



A third specimen, a female, taken on October 14, is in fresh winter 

 plumage. Judging by its smaller size, it appears that the two sum- 

 mer-plumaged birds were males. 



GAVIA ARCTICA PACIFICA (Lawrence) 



Pacific Loon 



Columbus pftcificiis Lawrenck, in Baird, Cassin, and Lawrence, Report of 

 explorations and surveys, etc., for a railroad from the Mississippi River to 

 the Pacific Ocean, vol. 9, Birds, pp. liv, 887, 889, 1858 (" San Diego, Calif., 

 and Puget Sound "=Presidio, near San Francisco, Calif.). 



Collins obtained 10 of these loons, two of them juvenals, the rest 

 adults of both sexes, all in winter plumage. The specimens with 

 dates were taken from September 23 to October 16. A full-grown 

 Juvenal was shot on September 23. A male, collected on October 14, 

 still has some of the summer plumage on the back and has a few black 

 feathers on the chin and throat. All were collected at Gambell. 



I am not aware of any satisfactory way of telling winter-plumaged 

 specimens of (r. a. viridigulaHs from G. a. pacifca and regret the 

 absence of summer adults from St. Lawrence Island. Hartert ^ gives 

 measurements that imply a longer bill in viridignlaris. If we use 

 this as a criterion, all the present birds are pacifica. 



The postnuptial molt must follow YQ.vy quickly on the termination 

 of nesting activities, as all but one of the adults are in full winter 

 plumage. 



•Die Vogel der paliiarktlschen Fauna, vol. 2, p. 1461, 1920. 



