Family FRINGILLIDAE. 



Coccothraustes coccothraustes (L.) — Hawfinch. 



(Plate 12, fig. a-c). 

 (Snouckacrt: Avifauna Neerlandica, p. 12, No 13). 



Colour of surface of shell: 



Colour of spots: 



Average dimensions : 

 Average weight of shell; 

 Texture of shell: 

 Shape : 



Nest: 



Site of nest: 



Number of eggs: 

 Breeding season: 

 Duration of incubation: 



pale bluish green; yellowish green; dusky 

 grey; greyish. 



olive brown ; olive green ; the uppermost spots 

 grey to very dark olive coloured blackish 

 brown; spots, etc. lying deeper are of a 

 violet grey appearance. 



vein-markings occur especially in the deeper 

 shell layers; the colour of some of the spots, 

 etc , and the manner in which they are 

 blended, frequently give the impression as 

 if together with the pigment an oily sub- 

 stance is also secreted. 



24.46 X 17.5 millimetres. 



0.236 gram. 



Has no special characteristic. 



varying between oblong and short ovoidal 

 (usually strongly rounded at the base). 



consists of vegetable material, lined with small 

 roots, and sometimes with hair or wool. 



higher or lower in mostly young trees, where 

 these do not stand close together; often on 

 or between thick branches. 



5—6 (after-set: 4). 



end of April— June. 



about 14 days. 



