BIRDS OF THE BRITISH ISLES. 



407 



twenty-three to twenty-five inches. The female is similar 

 to the male, but is a little less in size. The young have 

 the feathers on the upper parts fringed with white. 



BlacMbroateb Diver, 



THE Black-throated Diver (Colymbus Arcticus, Linnseus) 

 is a resident in the British Islands, and is also found in 

 the Northern Palearctic and Nearctic Regions. The 

 adult in summer dress has the upper parts blackish, with 

 bars and spots of white; crown and hind-neck, ashy-grey; 

 chin and throat, black, glossed with purple, and crossed 

 by a band of black and white streaks ; sides of neck and 

 chest, longitudinally banded with white and black ; below 



