Family ClCONllDAE. 

 Ciconia ciconia (L.) — White Stork. 



(Plate 122, fig. a-b). 

 (Snouckaert : Avifauna Ncerlandica, p. 85, No. 199). 



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: 

 Remarks: 



white, which has changed into dirty or 

 more or less yellowish white through the 

 glutinous layer; yellow or grey cloudy 

 spots are of an accessory nature; when 

 light penetrates through the shell it shows 

 through light yellow tinged more or less 

 greenish. 



72.58 X 51.86 millimetres. 



10.76 grams. 



to the unaided eye the texture is charac- 

 terized by a uniform shagreen-like nature. 



ovoidal. 



composed of vegetable materials and lumps 

 of earth; the lining also contains manure, 

 rags, feathers, etc. 



on roofs of tall buildings, chimneys, etc. 



3-5. 



April, May, June. 



about 30 days. 



The description of these eggs by older wri- 

 ters ') as being coloured „ochre-yellow" 

 or „yellowish green" is, in its generalness, 

 certainly not correct. That, however, these 

 shades occur occasionally, I do not at all 

 consider excluded, as the intensity of the 

 yellowish colour of the gluten varies in a 

 considerable measure in different eggs, 

 while the internal, more or less greenish 

 yellow tint (those of C. n/^ra are coloured 

 intensely green internally) makes it likely, 

 in my opinion, that externally, too, a 

 greenish tint sometimes occurs. 



') See Naumann, 1. c. VI, p. 316. 



