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ACOUART ERGY) (OU RIN AL Oe 
ORNITHOLOGY: 
VOL. XVII. JE, rgoG: INOr2: 
OCCURRENCE OF ZLARUS GLAUCESCENS AND 
OTHER AMERICAN BIRDS IN HAWAII. 
BY H. W. HENSHAW. 
A CERTAIN interest attaches to the occurrence of birds in 
regions far distant from their customary bounds because such 
occurrences indicate one of the ways in which species are distrib- 
uted. More than usual interest attaches to the occurrence of 
foreign species in the Hawaiian Islands because of the remote- 
ness of the Island from continental areas, California, the nearest 
mainland, being some two thousand miles distant. The following 
desultory notes, therefore, will not be without value. 
Giaucous GULL (Larus glaucescens). 
This Gull is becoming an irregular though a rare visitor to the 
island of Hawaii, following vessels from San Francisco to Hilo. 
I learn from the captains of several vessels sailing between the 
two ports that the numerous Gulls that frequently attend the 
course of outward bound vessels usually turn about when off 
shore a hundred miles or so. Occasionally, however, one or two 
Glaucous Gulls, for some reason or other, fail to join their fellows 
on their homeward course, and day after day steadily follow 
in the course of the Island bound vessel. Such birds frequently, 
perhaps always, roost at night upon the yards. 
