26 REPORT ON THE MIGRATION OF BIRDS. 



March 18th, a fortnight later than in 1881. In autumn, a 

 general migration of Rock Birds, hetween Aug. 13th and 18th, 

 during a fog (Why do birds apparently often choose a fog to 

 depart in?), light S.E. (or is it always more to do with direction 

 of the wind at the time?). See back. At Pentland Skerries, 

 continuous streams of Guillemots flying E. through the N. 

 Pentland Firth. Little Auks, one in E. gale on Nov. 16th, close 

 to Isle of May, and more resting on 18th ; and a few in a severe 

 snowstorm on Dec. 7th, at same place. Four species of Alcidce, 

 Of unknown birds I have left out notices this year, though 

 keeping note of them for further use, as they may come to be 

 identified later. 



