ANNUAL MIGRATIONS 137 



local hotel where he learned about the experiments 

 and later brought the ring in to the University. In 

 this instance, at least, there was no error in identifi- 

 cation and any one who knows both birds can hardly 

 doubt that any observant individual living in raven 

 country where crows also occur in summer could 

 readily distinguish the two species. 



The first sight record from the Lesser Slave Lake 

 country was obtained on November 18, nine days 

 after our releases and two months after the last 

 crow had previously been noticed in the district. 

 Without exception, not one of the old-time residents 

 consulted on the shores of Lesser Slave Lake can 

 recall even a single crow wintering there in previous 

 years. It was most unfortunate that Edmonton 

 should have been situated so as to have large 

 tracts of muskeg and sparsely settled wilderness 

 within 100 miles to the north and northwest from 

 which returns could hardly have been expected, 

 but circumstances made it impossible to carry out 

 the original decision to conduct the experiment a 

 hundred miles further south. Of the experimental 

 birds that left us, 48 per cent have thus never been 

 accounted for, while 15 per cent have been returned 

 from points south of Edmonton, and another 15 

 per cent of the north. Of the eight controls that 



