VOL. XIII.] THE BIRDS OF BARDSEY ISLAND. 69 



new arrivals and many of the others with them had dis- 

 appeared again by mid-day. 



On the early morning of the loth the first daylight passage 

 movement was noticed ; it comprised three birds only, 

 travelling with a dozen Swallows and a Grey Wagtail. They 

 appeared to be coming from the north-west and were following 

 the western slope of the mountain round, at about half its 



MIGRATION 



BARDSE\ IS 



SEPTEM BE 



A. > MAIN WA& 



B.= SWALLOW 



height (say 200 feet in total altitude above sea level) and over 

 the low part of its southern shoulder and so out to sea to the 

 east or slightly north of east, taking a line for the promontory 

 on the east side of Hell's Mouth Bay, which is the first bit 

 of the Welsh coast visible on topping the southern shoulder 

 of Bardsey mountain. The Pipits present on the island on 

 this day were probably the summer residents only. 



On the nth a considerable number and on the 12th smaller 

 numbers had arrived overnight and were found, chiefly, in 



