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BIRDS OF THE BRITISH ISLES. 



Willow Wren. 



THE Yellow-browed Willow Wren (Phylloscopus supercili- 

 osus, Gmelin) is an exceedingly rare abnormal autumn 

 migrant to the British Isles. It is found inhabiting the 

 North-east Palearctic Region. The adult male in summer 

 is above "greyish-olive, washed with green on rump and 

 upper tail-coverts ; wings, brown, crossed by two con- 

 spicuous whitish bars ; most of feathers externally margined 

 with yellowish-green ; from base of bill to nape a broad 

 greyish-white streak, with a dark one immediately below it 

 and through the eye; beneath, white, washed with yellowish- 

 green, especially on flanks ; axillaries, yellow ; " irides, dark 

 brown ; bill, legs, and feet, brown. Length, about three 

 inches. 



