EAGLES. 



231 



the country has been irrigated; and he refers to the sudden immigration of a 

 number of these birds into a district where irrigation works had been recently 

 opened. The same observer notes that this eagle generally sits in a slouching 

 kite-like fashion across a branch, halfway up a tree ; whereas, on the other hand, 

 the imperial and tawny eagles generally sit bolt upright at the very top of a tree, 



Other Species. 



SPOTTED EAGLE (i nat. size). 



and consequently cannot be seen by an observer immediately beneath. The spotted 

 eagle commonly nests in trees. 



Other species of the genus are the tawny eagle {A. rapax), of 

 Africa, distinguished by the tawny hue of the immature plumage ; 

 the slightly smaller but closely allied Indian tawny eagle {A. vindhiana); the 

 small brown Wahlberg's eagle (A. wahlbergi), of Africa, distinguished by a slight 

 occipital crest ; and the remarkable South African vulturine eagle {A. verreauxi), 

 which differs from all the rest in having the lower part of the beak and rump 

 white, the rest of the plumage being black. Remains of extinct eagles, some of 

 which probably belong to Nisaetus, while others may pertain to Aquila, occur 



