1917-] Birds in the Ancre Valley. 533 



Parus caeruleus. Continental Blue Titmouse, 

 Small numbers were met with from time to time. 



JEgithalus caudatus roseus. British Long-tailed Tit. 

 Occasionally seen near the Passerelle de Magenta and in 

 Aveluy Wood. 



Lanius excubitor. Great Grey Shrike. 



A single example appeared on 28 January near Mesnil 

 and remained for a few days during the hard weather. He 

 allowed me to approach him closely on several occasions 

 before swooping off his perch on a telephone-pole. 



Turdus viscivorus. Missel-Thrush. 



Several were seen about tlie end of March in the fields 

 near Bapaume. 



Turdus musicus (subsp. ?). Song-Thrush. 

 Uncommon. A few were observed in the Authuille 

 marshes during the hard weather in January. 



Turdus pilaris. Fieldfare. 



Three of these birds were seen near Martinsart on 

 15 November, and two in the marsh at Hamel on 

 24 January. They were very sliy on both occasions. 



Tardus merula. Blackbird. 



More numerous than the Song-Thrush, but not at all 

 common. It was more frequently met with in March near 

 Behagnies. 



Phcenicurus titys. Black Redstart. 



From 28 to 31 January one example frequented tbe 

 ruined village of Mesnil, which was otherwise deserted save 

 for a few House-Sparrows. 



ErithacTis rubecula (subsp. ?). Redbreast. 

 Common but not numerous. 



Accentor inodularis. Hedge-Sparrow. 



About equal in numbers to the preceding species. 



Troglodytes troglodytes. Wren. 



Commonly seen in the reed-beds between Hamel and 

 Authuille. 



