C. & H. ALEXANDER: SONG-PERIODS OF BIRDS. 369 



sing- occasionally. The Willow-Tit, Yellow Wagtail, and 

 Spotted Flycatcher we have only recorded once. 



The following- forms a summary of our observations on 

 the song'-periods of various birds : — 



RESIDENTS. 



Mistle-Theush (Tardus viscivorus). Very occasioiially 

 during" September and October, rather more often during- 

 late November and December, frequently at the end of 

 December and early January, regularly from the end of 

 January to the fourth Aveek of May, occasionally after- 

 wards to the first week of June. 



Song-Thrush [T. musicus). Frequently during- Sep- 

 tember, October, and early November, even beginning in 

 the end of August ; begins its sjDring song at the end of 

 November or in early December, and continues to the third 

 week of July ; in very favourable localities the break and 

 re-commencement in the end of November is not apparent. 



Blackbird (T. merula). Occasionally during the latter 

 part of August and most of September, in the afternoon. 

 Begins for a few minutes about three-quarters of an hour 

 before sunrise on mild mornings after the middle of 

 January ; increases gradually during- February, and sings 

 regularly from then to the fourth week of July. 



RoBi.v {Erithacus rubecula). From the third or fourth 

 week of July regularly to the fourth week of June, except 

 during- severe weather. 



Golden-Crested Wren (Regulus cristatus). Occasionally 

 during the latter half of August, frequently during most 

 of September, diminishing at the end ; occasionally until 

 the middle of October. Fairly regularly from early 

 February, and regularly from the middle of March to the 

 end of June ; occasionally continuing- until the fourth 

 week of July. 



Hedge-Sparrow {Accentor modularis). Regularly from 

 the second week of September to the end of July, 

 occasionally during- August ; stops during frosty weather 

 in December, and during severe weather in January. 



