FAMILY TURDIDAE. 



Phoenicurus titys (L.) — Black Redstart. 



(Plate 76, fig. a-d). 

 (Snouckaert: Avifauna Neerlandica, p. 48, No. 107). 



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 : 



pure white; sometimes tinted faintly bluish 

 green; marked as an exception with a few 

 rusty red speckles easily visible with the 

 unaided eye; when examined with a mag- 

 nifying glass many apparently unspotted 

 eggs appear to be marked with similar, 

 only very fine, specks. 



19.4 X 14.4 millimetres. 



0.12 gram. 



not specially characterized. 



mostly ovoidal. 



consists of vegetable material, lined with 

 hair, wool and feathers. 



in holes in walls; inside houses on beams, 

 in verandas, etc. 



5—6, sometimes 7 (after-set : 4—5). 



May (sometimes end of April)— July. 



about 13 days. 



