THE NATIONAL GEOGRAPHIC MAGAZINE 



THE ETERNAL \\AR AGAINST 



) National Geographic Society 

 FLYCATCHERS ARE VALUABLE ALLIES 



Fortunate is the farmer whose orchards or groves shelter'the Great Crested Flycatcher 

 (upper left), as it eats prodigious numbers of weevils, beetles, and other crop destroyers. This 

 bird has the mystifying habit of weaving a snake's skin into its nest. Its four companions are 

 westerners. The Ash-throated Flycatcher (upper right) lives in the Far West, the Oliva- 

 CEors and Sulphur-bellied (center, left and right) in the mountains of Arizona, and the large 

 Derby Flycatcher (bottom) in the lower Rio Grande Valley. 



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