134 STUDIES IN BIRD-MIGRATION 



Greater Wheatear. 



Spring. — 27th April to ist June. 



Autumn. — 5th September to 20th November. Chiefly September. 



Whinchat. 



Spring. — 30th April to 6th June. Chiefly second and third weeks of 



May, 

 Autuinn. — 24th August to 9th November. Chiefly September. 



Spotted Flycatcher. 



Spring. — 12th May to 14th June. 



Autumn. — i6th August to 30th November. Chiefly September. 



Pied Flycatcher. 



Spring. — 15th and 30th April to 24th May. Chiefly middle weeks of 



May. 

 Autumn. — 24th August to 5th November. Chiefly September. 



Swallow. 



Spring. — 17th and 30th April to 8th June. Chiefly second week to 



end of May. 

 Autumn. — 9th September to 13th November. Chiefly mid-September 



to mid-October. 



Martin. 



Spring. — 7th May to 8th June. Chiefly late May and early June. 

 Autumn. — September to i6th November. Chiefly mid-September to 

 mid-October. 



Sand-Martin. 



Spring. — 28th April to ist June. 

 Autumn. — September to 12th November. 



Swift. 



Spring. — 8th May to 23rd June. Chiefly late May. 

 Autumn. — July to i6th November. Chiefly August. 



Nightjar. 



Spring. — 20th May to loth June. 

 Autumn. — 17th August to iSth October. 



