NON-INDIGENOUS BRITISH BIRDS. 75 



streaks or spots chiefly at the larger end. Generally 

 the markings are most numerous and intricate over the 

 larger end of the cl%% and conceal much of the ground 

 colour, but varieties are not uncommon in which the 

 blotches are scattered, and show much of the ground 

 colour between them. A few pale gray underlying 

 markings are visible on many eggs. Average measure- 

 ment, 12 inch in length by -85 inch in breadth. 

 Incubation, performed by both sexes, lasts from fourteen 

 to sixteen days. 



Diagnostic characters : It is impossible to give 

 any character by which the eggs of the Fieldfare can be 

 distinguished from those of the Blackbird or the Ring 

 Ouzel. Both the latter species are non-gregarious, 

 however ; from eggs of the Redwing they are easily 

 separated by their larger size and generally handsome 

 appearance. They should be carefully identified, how- 

 ever, in every case. 



Family TURDID.^. Genus TuRDUS. 



Sub-family TURDINyE. 



REDWING. 



TuRDUS iLiACUs, Lhi7iceus. 



(British : Common autumn migrant.) 



Single Brooded. Laying season, May and June to middle 

 of July. 



Breeding area: Northern Pahearctic region. The 

 Redwing breeds in suitable localities throughout Scandi- 

 navia, and in Russia from about lat. 54° northwards to 

 the coast. Herr E. Hartert states that it breeds 



