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BIRDS OF THE BRITISH ISLES. 



Siberian (5roun& ^brueb* 





The Siberian Ground Thrush {Geocichla sidrica, Pallas)^ 

 which is a very rare irregular autumn migrant to the 

 British Isles, is a straggler from Northern Asia. The 

 adult male has the general colour of the upper parts deep 

 slate-grey, margined with paler ; central tail-feathers, dark 

 slate-grey; rest, blackish, the two outer ones tipped with 

 white ; eye-stripe, white and broad ; under parts, greyish, 

 changing into white on centre of belly : under tail-coverts 

 have white tips ; irides, deep brown ; bill, blackish ; legs 



