338 



AVES 



chief attraction. The eggs have been collected, resulting in no 

 evidence of their presence, other than bones. The last living speci- 

 men was seen in 1844. 



The penguins (Figure 184), marine birds found in the Antarctic 

 seas, have paddlelike wings which work from the shoulder in a rotary 

 fashion. The legs are set far back, and the feet are used for 

 steering, not propulsion. Penguins have almost waterproof feathers. 

 Their plentiful subcutaneous fat produces a marketable oil. The 

 male aids in incubating the eggs which require 6 weeks to hatch, 

 and the young are blind. 



Fig. 184. Galapagos penguin. (Courtesy of N. Y. Zool. Soc.) 



Order 2. Longipennes. — Gul/s (Figure 185, A and B) are 

 aquatic, mainly oceanic, of medium size, with long pointed wings 

 and webbed feet. They are scavengers of the ocean, feeding from 

 the surface. Terns are more active than gulls. Their bodies are 

 slender and they have long-forked tails and pointed bills. They 

 nest on islands in colonies. 



Order 3. Tubinares. — The petrels , " Mother Carey's Chick- 

 ens," are widely ranging sea birds of moderate size with long narrow 

 wings and a hooked bill. The " stormy petrel," the smallest of 



