192 CATALLHHJK OF BUIJJS. 



I have observed specimens with the frill or ruff fully 

 developed in February and March, and on one occasion 

 as soon as January 18th. 



The nest of this species is a large accumulation of 

 the stems of the I'eed amongst which it is built, the 

 whole of the structure, together with its contents, being 

 perpetually moist. 



In three or four instances where I have closely 

 watched the habits of this bird, I have discovered that 

 the eggs were regularly laid on alternate days; the 

 young I have also noticed being hatched at similar 

 intervals. 



The specimens in the case were obtained on Hick- 

 ling Broad, in June 1871. 



SANDWICH TERN.— (Mature— Summer.) 



Case 251. 



These fine birds are to be met with on several parts of 

 the coast during the summer months. On the Fern 

 Islands, off the coast of Northumberland, they nest in 

 two or three different colonies in company with the 

 Arctic Terns. 



In a few localities in the north they breed on inland 

 lochs. 



The specimens in the case were obtained at the 

 Fern Islands in June, 1867. 



LESSER SPOTTED WOODPECKER. 



Case 252. 



The Lesser Spotted Woodpecker is, I believe, of much 

 more frequent occurrence than is generally supposed, 



