1918.] Oological Notes from the River Somme valley. 357 



Peronne District : 



June 23. (5) very much incubated. 

 24. (4) incubation slight. 

 26. (4) ditto. 



Witli regard to their song, I noticed that those that lived 

 in the rye-grass mimicked Partridge and Quail, which were 

 common in the immediate neighbourhood. This was, of 

 course, in addition to many other successful efforts at 

 mimicry. 



Acrocephalus arundinaceus. Great Reed-Warbler. 



First noted on 14 May in a reed-bed near St. Valery. 

 A nest containing five fresh eggs found on 11 June. This 

 is a very common species in the reed-beds at Peronne. 



Acrocephalus schoenobaenus. Sedge-Warbler. 

 Firt^t noted on 29 April. Not a very common breeding 

 species, and only one nest met with. 



Hypolais icterina. Icterine Warbler. 



Although most carefully sought for, this species was not 

 identified on the Somme, but is common in river valleys 

 north of Abbeville. 



Phylloscopus trochilus. Willow- Warbler. 

 First heard on 14 April. A fairly common breeding 

 species. 



Phylloscopus coUybita. ChiffchafP. 



First heard on 8 April. A fairly common breeding 

 species. 



Turdus viscivorus. Mistle-Tlirush. 



Not common. A pair here and there nesting in village 

 orchards. 



Turdus musicus. Continental Song-Thrush. 



Not common, and extremely shy and retiring. They 

 appear to breed much later than those at home. Nests with 

 five and four eggs respectively were found in the Foret de 



