Family PICIDAE. 



Jynx torquilla (L.) — Wryneck. 



(Plate 88, fig. a-c). 

 (Snouckaert: Avifauna Neerlandica, p. 57, No. 136). 



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: 



glossy white. 



20.3 X 15.4 millimetres. 



0.21 gram. 



see the general review of the Family. 



short oval. 



the eggs lie immediately on the bare lower 

 surface of the hole; if there is a layer of 

 moss, wool, etc., it is most decidedly a 

 part of an old nest of some other species 

 of bird, and torquilla has been unable to 

 remove it; it is not until there are young 

 birds that all kinds of sharp objects, such 

 as bits of glass and shells, etc. are put 

 into the hole. l ) 



in existing holes of trees. 



7—12, usually 9. 



June— beginning of July. 



about 14 days. 



J ) See for further nidological and other particulars the very important article 

 by Mr. J. L. F. de Meyere, in the „Jaarboekje der Nederlandsche Ornitholo- 

 gische Vereeniging", No. 7, p. 62, etc. 



