224 CItESTED SPIZiETUS. 
a native of Asia and Ceylon, and seems extremely 
rare. 
We now pass to the more common genus Cir- 
cus , or Harriers. This is the form which, in their 
own circle, is thought to represent the nocturnal 
birds of prey. They are of a light and buoyant 
form, the body and members lengthened, in some 
species almost weak. The feet and tail bearing 
considerable resemblance to those parts in the 
