OCTOBER 1964 



NOVEMBER 1964 



V»V 



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V 



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•v. 



• Ibird 



• 5 birds 



• 25 birds 



• 100 birds 

 #400 birds 



»v 



V. 



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% 



Arctic Terns or possibly Common Terns 

 Sterna hirundo Linnaeus were first observed 

 in the study area on April 23, 1964. None was 

 seen after May 2, 1964 until the spring of 1965. 

 The 1965 migration ran from April 21 to May 

 30, considerably longer than the 1964 migra- 

 tion. 



All birds seen in both years were heading 

 north. No return migration was noted. 



Although the sighting of as many birds along 

 the 157° W. leg as along the other three indi- 

 cates a fairly equal migratory movement across 

 the entire width of the study area, the smaller 

 number of sightings of this species west of the 

 area by POBSP personnel indicates that the 

 western margin of the area may define the 

 western limit of its migration route. 



POBSP personnel have collected specimens 

 of S. paradisaea west of the area. 



Sooty Tern 



Sterna fuscata Linnaeus 



53 



