1911] Sioarth: Alaska Expedition of 1909. 1.11 



Kiver in September, they were occasionally met with in flocks 

 of eight or ten individuals, usually very wild. Many were seen 

 about the shipping at Juneau, September 30, and Hasselborg 

 reported them as abundant at Game Cove, Admiralty Island, as 

 late as November 8. 



Nine specimens were secured (nos. 9322-9330), five adults 

 and four juvenals. Of four adult males, two are in practically 

 perfect adult plumage (nos. 9322, 9323), and two (nos. 9326, 

 9327, Coronation Island, May 17) are indistinguishable from 

 average females. No. 9330, juvenal female, Taku River, Sep- 

 tember 12, has just begun the post-juvenal molt. On the whole 

 the series bears out the characters ascribed by Grinnell (1909, 

 p. 241) to the form caurinus. One of the two high plumaged 

 males (no. 9322) has the terminal white spots on the outer 

 rectrices unusually extensive, but as this same bird has many 

 white feathers scattered over the head, neck and throat, large 

 white tail spots may be merely a further manifestation of this 

 albinotic tendency. The juvenals are appreciably darker, 

 especially ventrally than are specimens of propinquus in corre- 

 sponding plumage from Nevada, California and Arizona. Robins 

 were observed on Mitkof Island and on the Taku River, feeding 

 on the seeds of the devil's club {Echinopanax horridum). 



Ixoreus naevius naevius (Gmelin). Varied Thrush. 



Found throughout the region though abundant at but few 

 of the points visited. First encountered on Kupreanof Island, 

 April 17, when two were seen and one secured. No more were 

 noted until we reached Port Protection, Prince of Wales Island, 

 on May 6, when several were heard singing in the woods. 



On Coronation and Warren islands, and at Port McArthur, 

 Kuiu Island, many were seen feeding along the beaches, in com- 

 pany with the robins, and evidently migrating. Varied thrushes 

 were subsequently seen, or heard singing in the woods, at Heceta 

 and Dall islands, Boca de Quadra, the Chickamin River, Portage 

 Cove, Revillagigedo Island, Etolin, Zarembo and Mitkof islands, 

 Port'snettisham, and the Taku River. Many were noted on 

 the wharves and among the shipping at Juneau, September 30. 



