The terrestrial mammals and birds of Nortli-liast Greeiilaiul. 183 



The following measures have been taken: 



Age Locality Wing Bill Tarsus 



mm. mm. mm. 



ad. The lield-ice 120 18 22 

 ad. - 113 15 22 



Razorbill. Alca torda (L.). 



Koch, Beutelsen and Uie Eskimo Gabrielsen observed a 

 solitary Razorbill lying in the open water at Mallemukfjeldet June 

 9«h 1907. 



Koch says, that they were so near the bird, that there could be 

 no mistake as to the identification. 



This species was not observed in any other place. 



Gyrfalcon. Falco gyrfalco (L.). 



The Gyrfalcon was by no means numerous as a breeding species 

 in the regions explored by the expedition. 



Only 5 nests were found, and one of these could not be iden- 

 tified with certainty. 



In the autumn of 1906 this species occurred however extremely 

 commonly on migration probably because the Lemmings were so 

 numerous that year. 



From August 20"^ until the end of September not a single day 

 passed in which one Gyrfalcon at least was not seen either in the 

 neighbourhood of the ship's-harbour or on Koldewey-Islands, Slorm- 

 kap or Hvalrosodden. The migration culminated in the first week 

 of September. 



The falcons appeared most numerously near the ship to which 

 they were allured by the pigeons of the expedition. From September 

 З»"^ to 17'h 17 falcons were shot here. Often 4 to 5 individuals would 

 appear at one time either circling around the mast-heads, on which 

 they sometimes settled, or sitting around on the surrounding hum- 

 mocks of ice or blocks of stone, watching for pigeons. 



As soon as these were started in the air, they were most violently 

 pursued by one or several falcons which, however, never succeeded 

 in capturing a pigeon. 



