Family FALCONIDAE. 

 Accipiter nisus (L.) — Sparrow-Hawk. 



(Plate 104, fig. a-d). 

 (Snouckaert: Avifauna Neerlandica, p. 66, No. 156). 



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 : 



white, tinged more or less bluish or sea- 

 greenish. 



rusty brown; dark red-brown; underlying 

 spots show through violet-grey; when 

 light shines through the eggshell it shows 

 through dark green. 



39.8 32.4 millimetres. 



1.78 gram. 



fine-grained. 



mostly rounded or bellied. 



consists of vegetable materials. (Nests of 

 other species of birds are also used). 



by preference in coniferous trees. 



4—6, sometimes 7, usually 5. 



May— June. 



about 3 weeks. 



