10 



seen that the main tide of immigration in 1908 was of shorter 

 duration than usual, taking place almost entirely between the 

 26th of April and the 12th of May. 



"With most species the average period of the migration 

 lasted for about a month. The Wheatear, however, arrived 

 more or less continuously between the 25th of March and the 

 24th of May; but it must be remembered that the observations 

 on that species refer to the two races, the larger of which 

 breeds in Greenland and arrives when the immigration of 

 our native race has almost finished. 



The Swallow arrived between the 7th of April and the 

 25th of Mav and the "Willow-Warbler between the 10th of 

 April and the 19th of May. The shortest period of immi- 

 gration was recorded in the case of the Wood- Warbler, which 

 was first observed on the 29th of April and had apparently 

 settled down in its breeding-quarters by the 11th of May. 



We have again arranged the species into four groups, 

 according to the area of their arrival in this country. 



A. Species arriving solely on the western half of the south 

 coast. 

 Ring-Ouzel, House-Martin, Land-Rail. 



Br Species arriving along the whole of the south coast, but 

 first and chiefly on the western half. 

 Wheatear, Whitethroat, Blackcap, Chiffchaff, Wallow- 

 Warbler, Wood- Warbler, Sedge- Warbler, Pied Fly- 

 catcher, Swallow, Sand - Martin, Swift, Common 

 Sandpiper. 



C. Species arriving along the whole of the south coast, but 

 first and chiefly on the eastern half. 

 W r hinchat, Lesser Whitethroat, Garden - Warbler, 

 Grasshopper- Warbler, Yellow Wagtail, Tree-Pipit, Red- 

 backed Shrike, Spotted Flycatcher, Nightjar, Cuckoo, 

 Turtle-Dove. 



