424 



COLYMBIDJ!. 



wing is extended ; chin white ; front of the neck ash- 

 brown ; breast and belly shining greyish- white ; sides under 

 the wing and the flanks, ash-brown. Young birds of the 

 year, in their first winter, have the beak yellow-brown ; the 

 head and back of a still lighter brown colour than old birds 

 in winter ; chin white ; sides of the neck pale wood-brown ; 

 under surface of the body and the sides clouded with brown, 

 on a ground colour of greyish- white. 



