Family STRIGIDAE. 



Strix flammea L. - Barn-Owl. 



(Plate 99, fig. a— c). 

 (Snouckaert: Avifauna Neerlandica, p. 62, N°. 149). 



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: 



dull lime white. 



39,5 X 30.7 millimetres. 



1.75 gram. 



see the general review of the Family. 



oval; compared with those of the Bubonidae 

 they are of all the species the most elon- 

 gated towards the pointed end, which is 

 blunt. 



the eggs lie without any intervening layer 

 on fragments of stone and mortar, straw, 

 decayed wood, etc. 



in holes and cracks in towers, old walls, 

 and similar structures; in lofts of barns, 

 etc.; also in hollow trees. *) 



4-7. 



April— September; however also found breed- 

 ing until in December. 



about 3 weeks. 



x ) See: Verslagen en Mededeelingen der „Nederlandsche Ornithologische 

 Vereeniging", No. 3, page 33. 



