The Wealth of Nations 

 
 
Wheatears no longer visit these shores, 
No-one knows why. 
 
Some say global warming 
has driven them far to the north, 
Some say deforestation and burning 
Withered their winter grounds to ash, 
Some say pesticide and pollution 
Destroyed their invertebrate prey, 
And some say trapping and shooting 
on their long Mediterranean way. 
 
Wheatears no longer visit these shores, 
Everyone knows why.