Family COLYMBIDAE. 



Podiceps fluviatilis (Tunstall) - Little Grebe. 



(Plate 191, fig. a-c). 

 (Siiouckaert : Avifauna Neerlandica, p. 139, No. 332). 



Colour of surface of shell : 



Average dimensions : 



Average weight of shell : 



Texture of shell : 



Shape : 



Nest: 



Site of nest: 



Number of eggs: 



Breeding season : 



Duration of incubation: 



like that of P. crisfafiis. 

 37.5 X 26 miili metres, 

 about 1.2 gram, 

 like that of P. ciislufiis. 



in ditches, by the edge of lakes, etc. 

 3 — 6 (sometimes mure). 

 April, May, June, July, 

 about 3 weeks. 



