136 STUDIES IN BIRD-MIGRATION 



Mallard. 



Spring. — 25th March to 14th May. 



Autumn. — 12th September to 28th November. 



Teal. 



Spring. — 25th March to nth May. 

 Autumn.- — 30th August to 29th November. 



WiGEON. 



Spring. — 25th March to nth May and 12th June. 



Autumn. — 30th August to 23rd November. Chiefly October. 



Tufted Uuck. 



Spring. — 24th April to loth May. 

 Autumn. — 29th October to 27th November. 



SCAUP-DuCK. 



Spring. — 24th March to 12th June. 

 Autumn. — 22nd September to 9th November. 



GOLDENEYE. 



spring. — 23rd March to 12th June. 

 Autumn. — 14th September to 21st November. 



Common Scoter. 



Spring. — 29th April to 7th June. 

 Autumn. — ^5th September to late October. 



Velvet-Scoter. 

 Sprifig. — 31st April and during May. 

 Autumn. — 17th September to 20th October. 



Red-breasted Merganser. 



Spring. — 1 6th March to 14th May. Chiefly early May. 

 Autumn.~yd September to 31st October. Chiefly September and 

 early October. 



RiNG-DoVE. 



Spring. — 23rd March to 31st May. Chiefly April and May. 

 Autumn. — 25th September to loth November. Chiefly mid-October. 



