THE BIRDS OF HELIGOLAND 585 



development of a swimming and diving bird. They never go on 

 land, even building their nest on the water in such a manner that 

 the eggs are for the most part half immersed. Europe possesses 

 five species of these remarkable birds, all of which are also visitors 



to Heligoland. 



392. Great Crested Grebe [GEOSSER LAPPENTAUCHER]. 

 PODICEPS CRISTATUS, Latham. 1 



Heligolandish : Groot Siedn = Great Silky (Grebe). 



Colymbiis cristatus. Naumann, ix. 686. 



Great Crested Grebe, Dresser, viii. 629. 



Grebe huppe. Temruinck, Manuel, ii. 717, iv, 448. 



The breeding zone of this bird having its northern limit in the 

 south of Sweden and Finland, and only stragglers being met with 

 in Norway, it need not surprise us that it is also of extremely rare 

 occurrence in the neighbourhood of this island. Now and then at 

 intervals of years, young birds in different stages are occasionaUy 

 shot during the winter months. In spring, when the crest is but 

 half-developed, it has only been seen here on two occasions. 



The species belongs to the Old World, and breeds from the 

 south of Sweden to Japan, and from the Cape of Good Hope to 

 New Zealand. 



393. Red-necked Grebe [ROTHHALS-LAPPENTAUCHER]. 

 PODICEPS RUBRICOLLIS, Latham.* 



Heligolandish : Siedn = Silky (Grebe). 

 Colymbus rubricollis. Naumann, ix. 720. 

 Eed : necked Grebe. Dresser, viii. 639. 



Grebe jou-gris. Temininck, Manuel, ii. 720, iv. 448. 



Old birds of this species are seen in spring dress only on rare 

 occasions; it is more than twenty years since the last example 



1 Podicipes cristatus (Linn.). a Podicipes griseigena (Bodd). 



