Breeding in Immature Plumage 341 
to obtain more conclusive evidence of these birds breeding before 
they have acquired the well-known adult plumage. 
5 
NEST OF BONELLI’S EAGLE. 
The male went straight to the nest and took up the duty of 
incubation without a moment's delay, the female winging her way 
over to the hills to my front and disappearing from view. Having 
