BIRDS OF THE BRITISH ISLES. 



115 



arctic Bluc^tbroatcb IRobin, 



^LJ^_ l-jJ^& ' l ^i gf^^ ^p- ^uncA/n 



The Arctic Blue -throated Robin (Eril/iacus succica, 

 Brehm) is an abnormal spring and autumn migrant to the 

 British Isles. There are, says Seebohm, three forms of 

 this bird: — First, the Northern or Arctic form, with the spot 

 in the centre of the throat red ; secondly, the South Euro- 

 pean form, with the spot in the centre of the throat pure 

 and silky white; and thirdly, the form of whicli the throat 

 is uniform blue. Length, about five inches. 



