i68 THE SCOTTISH NATURALIST 



numbers of Black-headed Gulls returned to the shore after 

 breedincf. 



'fc.* 



July. 



The first week of July was warm and the winds chiefly 

 southerly ; thereafter there was a great prevalence of northerly 

 winds, and the weather was therefore cold for the time of 

 year. In the first week the only movements recorded are 

 departures of adult Cuckoos and a little Wader movement. 

 The second week showed little more migration : besides the 

 Wader a few passage migrants are noted ; a noticeable 

 decrease of Terns is reported from Sule Skerry on the 13th, 

 and of Puffins there on the 17th. In the last week of the 

 month the movement became more pronounced ; departures 

 of Swifts and Tree-pipits are noted, and from the 27th 

 onward a considerable overseas arrival of Wader took place, 

 and a good deal of Duck movement is also recorded. 



August. 



Up to 8th August the wind was between north-east and 

 north-west, and light, and the movements recorded principally 

 refer to departures of our summer visitors, and arrivals of 

 Wader from overseas. From the 9th to the 14th the wind 

 was chiefly south-east, and a rather stronger movement of the 

 same character is recorded. Thereafter to the end of the 

 month the wind was almost entirely between north-west and 

 south-west, and moderate in force. The movements 

 continued the same, small but constant, with nothing 

 approaching a rush. Few passage migrants are recorded, 

 with the exception of White Wagtails, which are noted in 

 some numbers. 



September. 



The wind during September was almost entirely from 

 some quarter between west and north-east, except from the 

 9th to the 13th and the 19th to the 23rd, when it was south- 

 east and south. 



Uniform and normal migration was the feature of 



