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, 
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 
other Species. ^£ r * ca , 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 
