154 Conservation Reader 



They are particularly on the watch for the Mediterranean 

 fruit fly and for the mongoose. 



When we upset the balance of Nature, we start a whole 

 chain of troubles. What can we do to escape the conse- 

 quences of our ignorance and carelessness? In the first 

 place we can protect the birds, for they eat enormous quan- 

 tities of the harmful insects. In the second place we can 

 see that no more of these dangerous pests are allowed to 

 land on our shores. In the third place we shall have to 

 fight, by every means that we can discover, those that are 

 already here. 



