(459) 



wind 



FlG. 270. Flight of an eagle (Aquila). 



a-b, flapping flight; B-C, soaring at constant height; C-D, 

 soaring in ascending spirals; d-e, gliding. (After Ahlborn.) 



Fig. 271. Soaring flight of kite (Milvus). 



Losing height downwind and gaining it upwind. Time-marks one second. 

 (After Hankin.) 



Fig. 272. Wings of vulture (Gyps). 



A, soaring upwind, gaining height; B, upwind on level; c, downwind, losing height; 

 D-F, gliding flight. (After Ahlborn.) 



