HARPY-EAGLES. 



233 



bars horizontal. This stage, which is the one represented in our illustration, is, 

 however, according to Von Penzeln, the plumage of the immature bird. The adult 

 is much darker, having the head and tliroat greyish brown, most of the upper-parts 

 dark blackish brown shaded and mottled with ashy, the upper tail-coverts with 

 white tips and irregular white barrings, the chest dark coloured, and the remainder 

 of the under-parts white. The dark tail, according to Dr. Sharpe, is tipped with 



GUIANAN HARPY-EAGLE (i Uat. siZC). 



whitish brown and crossed with only three pale bars, above wliich it has some 

 whitish markings. But little is known of the mode of life of this handsome bird, 

 which occurs both in the forest near the coasts, and the wooded districts of the 

 plains, but more commonly on the banks of the rivers. During its periods of 

 repose this eagle will sit for hours on the summit of some dead tree, uttering at 

 intervals its peculiarly loud and harsh cry. Its prey comprises mammals and 

 birds, and its nest is said to be generally built in a hollow tree. More is known 

 concerning the true harpy-eagle, which is the most powerful bird of prey in North 



