140 STUDIES IN BIRD-MIGRATION 



Greenshank. 



spring. — loth April to 7th May and 8th June. 

 Autumn. — loth July to 23rd November, 



Bar-tailed Godwit. 



Spring. — 1 6th April to 19th June. 



Autumn. — 14th July to 11th November. Chiefly mid-August and 

 during September. 



Black-tailed Godwit. 



Spring. — loth April to 19th June. 

 Autu7nn.— 6\.\\ August to 22nd October. 



Curlew. 



Spring. — 3rd March to 3rd June. 



Autumn. — 15th August to 23rd November. Chiefly August and 

 September. 



Whimbrel. 



Spring. — 15th April to 8th June. Chiefly May. 



Autumn. — i6th July to 29th November. Chiefly mid-August and 

 during September. 



Arctic Tern. 

 Aututnn. — nth September to 29th October. 



POMATORHINE SkUA. 



Spritig. — ist March to nth June. 

 Autumn. — iSth August to 27th November. 



Buffon's Skua. 



Spring. — 1 2th May to 14th June. 

 Autumn. — nth August to 29th October. 



Slavonian Grehk. 



Spring. — 5th May to i8th June. 



Autumn. — 9th September to 28th November. 



