Family HIRUNDINIDAE. 



Hirundo rustica L. — Swallow. 



(Plate 82, fig. a-c). 

 (Snouckaert: Avifauna Neerlandica, p. 52, No. 126). 



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: 



dull white. 



rusty brown ; as an exception : red, or very 

 dark brown; when lying deeper they ap- 

 pear to be of a grey or violet grey colour. 



19.4 X 13.4 millimetres. 



0.103 gram. 



not specially characterized. 



mostly oblong ovoidal. 



is built of muddy earth, mixed with viscous 

 saliva, and intermixed and lined with little 

 bits of straw, hair, and feathers. 



indoors: in barns, stables, etc., as well as 

 outdoors: under gutters, penthouses and 

 in such like places; also under bridges. 



5-6 (after-set: 3-4). 



about the middle of May— beginning of 

 August. 



Duration of incubation: 



about 14 days. 



