2O4 BRITISH BIRDS. 



iris red. Length about 24*00; wing 11*50. Young: 

 like young of C. glacialis, but smaller. 



Breeds rather commonly on the lochs in many parts 

 of the Highlands, also in the Orkneys and Hebrides, 

 but to the rest of our coasts it is a rare winter visitor. 

 Eggs : 2 ; olive-brown, sparingly marked with blackish- 

 brown ; 3*00 by 2*00 ; on ground close to water's edge. 



369. Colymbus septentrionalis, Linn. RED-THROATED 



DIVER. 



Hab. Northern Palasarctic and Nearctic regions. 



Adult : above marked with small longitudinal spots of 

 white, not bars ; cheeks and sides of neck grey ; upper 

 throat red ; below white. In winter red throat is lost. 

 Length 21*00; wing 10*75. Young: at first spotted above 

 with white ; later with the feathers dusky, but edged 

 distinctly with white. 



Breeds throughout the Highlands, also in the Shetlands, 

 Orkneys, and Hebrides, and of recent years in Co. 

 Donegal. It is of common occurrence on our coasts in 

 winter. Eggs : 2 ; smaller than those of C. arcticus ; 

 2*75 by 1*85. 



Family Podicipedidse. 



GENUS CGI, PODICIPES, Latham (1787). 



Bill much as in Colymbus ; toes flattened and furnished 

 on inner sides with broad membranes. 



370. Podieipes eristatus (Linn.). GREAT CRESTED 



GREBE. 



Hab. Temperate portions of Old World. 

 Adult : crown, crest and upper parts dark brown ; 

 secondaries white ; chin and cheeks white, the feathers 



