252 BRITISH BIRDS. 



Mortensen, No. 117, marked in the same place and manner 

 as above on September 1st, 1909. Recovered (shot) on 

 November 25th, 1909, in the Moray Firth, three miles 

 from Inverness, Scotland. 

 This Teal was kindly reported by Mr. R. H. W. Leach, who 

 saw it in the flesh. 



Mortensen, No. 1040k, marked by Herr H. C. C. Mortensen 

 on October 19th, 1909, as No. 1030y above. Recovered 

 (caught) in Sir Savile Crossley's duck-decoy, at Somer- 

 leyton Hall, Lowestoft, Suffolk, on December 5th, 1909. 

 This Teal was reported by Sir Savile Crossley to the editor 

 of the " Field," who very kindly forwarded the letter to me. 



Herr H. C. C. Mortensen began marking birds with metal 

 rings in Denmark in 1899. In October, 1907,* he marked 

 102 Teal caught in the decoys on the Island of Fanoe, 

 south Denmark. Of them up to the end of 1908 twenty-two 

 had been recovered in the autumn and winter — seven in 

 western France from a little north of the Loire to a little 

 south of the Gironde, two from Holland, one from south 

 Spain, one from north Italy, and the following from the 

 British Isles : — 



Near Askeaton, co. Limerick, Ireland. 

 Junction of Rivers Feale and Cashen, 



co. Kerry, Ireland. 

 Leominster, Herefordshire. 

 Tregothnan, near Truro, Cornwall. 

 Wareham, Dorset. 

 Enniskillen, co. Fermanagh, Ireland. 

 Near Maryborough, Queen's Co., Ireland. 

 Woodlawn, co. Galway, Ireland. 

 Southampton. 



Herr Mortensen informs me (in lift ) that he marked more 

 Teal captured in the same way in the autumn of 1909, and 

 that the birds recorded above are three of those marked in 

 1909. 



H. F.W. 



THE EFFECT OF FOOD-SUPPLY UPON FECUNDITY. 



It will be interesting to follow the argument of Mr. Percy F. 

 Bunyard ; also the additional cause, or causes, for the 

 " remarkable phenomenon " of the recurrent years of unusual 

 fecundity, which Dr. Ticehurst foreshadows as a subject 

 which will become more fully understood than at present. 



* Vidensk. Medd. fra den Naturhist. Forening i Kobenhavn, 1908, 

 pp. 127-139. 



