ii2 BIRDS OF THE BRITISH ISLES. 



Siberian (Srounfc Gbrueb. 





THE Siberian Ground Thrush (Geocichla sibrica, 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 



