SISKIN. 



549 



the head are brownish at the end, hiding the black at the 

 base. The plumage becomes much richer towards the 

 season of incubation. The black parts become deeper, and 

 the olive of a yellower green. 



The female is smaller than the male, measuring from 

 four inches and a quarter to three-eighths in length ; the 

 head, back, and upper part of the wings greyish olive 

 brown, streaked with dusky black ; under parts greyish 

 white, streaked with dusky black, and tinged with green- 

 ish yellow on the throat and breast. 



Young males after their first moult have the black fea- 

 thers on the head margined with brown, and the colours, 

 though brighter than those of the female, are not so vivid 

 as those of the adult male. 



The nest below is that of the Hawfinch. 



