Why Birds Come and Go 



the world often affects the bird population in a 

 place very far distant, as when a sooty tern belong- 

 ing on the Florida Keys got caught in a tornado 

 and was blown northward until it had lost its reck- 

 onings. Finally, it was picked up exhausted in a 



Erratic winter visitors" — White- winged Cro> 



Hudson river village. On some winter walk, that 

 rare apparition, a great, blinking, snowy owl, from 

 the arctic regions, may startle you, like a ghost 

 among the evergreens. Quantities of red crossbills 

 came far over the Canadian border a few winters 

 ago. Bird lovers wrote each other excited letters 

 in their joy at finding these charming, friendly little 



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