172 THE SCOTTISH NATURALIST 



more westerly. Thus westerly winds were prevalent, the 

 only time when there was any easterly wind being in the 

 third week of the month. During April there were unusually 

 large arrivals of summer visitors ; this was apparent from the 

 first week, but was particularly pronounced from the begin- 

 ning of the third week to the end of the period. In addition 

 to these large movements, which were the principal feature 

 of the month, there were the usual departures of winter 

 visitors and a certain amount of passage migration, but this 

 last was not as strong as is usually the case at this season. 



May. 



The temperature during the month was extremely 

 variable, the first and third weeks were mild, the second 

 and fourth cold ; the wind was almost entirely between 

 northerly and south-westerly. This being the case, the 

 movements in May were very normal in character, and there 

 was no rush of any kind. In the first week there were large 

 arrivals of summer visitors ; these, as was to be expected, 

 became less as the month advanced, until by the end it was 

 evident that practically all our own breeding birds had 

 arrived at their nesting places. The main arrivals of Terns 

 at their breeding stations took place during the third week, 

 the dates in several cases being rather late. Throughout 

 the month there was a small but steady stream of passage 

 migrants along our coasts, winter visitors were taking their 

 departures for their northern nesting places, but uncommon 

 visitors were unusually scarce. 



June. 



Up to 7th June the wind was from some north-westerly 

 quarter, and there was practically no migration, with the 

 exception of a little Wader movement. On the 8th the 

 wind changed into the north-east over the northern parts 

 of Scotland, and from that date till the 14th the type was 

 easterly and north-easterly, and there was a very interesting 



