484 BIOLOGY FOR BEGINNERS 



COLLATERAL READING 



. The following books have many references in various places; see index. 

 Familiar Fish, McCarthy; American Food and Game Fishes, Jordan and 

 Everman; American Animals, Stone and Cram; American Natural 

 History, Hornaday; Our Vanishing Wild Life, Hornaday; N. Y. Forest, 

 Fish and Game Commission Reports; The Frog Book, Ditmars; The Reptile 

 Book, Ditmars; Economic Zoology, Osborn, from page 311 to end; Useful 

 Birds, Forbush; Economic Value of Birds to the State, Chapman, N. Y., 

 F. F. and G. Com.; Birds of Eastern North America, Chapman, pp. 6-7; 

 Bird Life, Chapman, Chap. I, and note; Birds of Eastern North America, 

 Reed, pp. 12-14; National Geographic Magazine, November, 1916, and 

 May, 1918; Domesticated Plants and Animals, Davenport; Birds in their 

 Relation to Man, Weed and Dearborn. 



SUMMARY 

 I. Fishes. 



1. Food for man (5000 species). 



2. Food for aquatic animals. 



3. Fertilizer. 



4. Oil. 



5. Glue, isinglass. 



n. Amphibia. 



1. Destroyers of insects. 



2. Food (frog legs). 



III. Reptiles. 



Harmful activities. 



1. Venomous snakes (rattler and copperhead). 



2. Venomous lizard (Gila monster). 



3. Man-eating crocodiles. 



4. Destroy birds' eggs and young (black snake). 



5. Destroy frogs (black and garter snakes). 

 Useful activities. 



1. Destroy insects. 



2. Destroy harmful rodents. 



3. Furnish food (turtle meat and eggs). 



4. Furnish shell (tortoise) and leather (alligator), 



IV. Birds. 



1. Destroy insects. 



2. Destroy weed seeds. 



3. Food (flesh and eggs). 



4. Feathers. 



5. Companions. 



