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NATURAL HISTORY READER. 



migrated with the sun, while others, believing it impossible 

 that such small and delicate birds could endure the great 

 fatigue and temperatures incident to such a migration, 



inlc-Swalknvs and their Nests. 



held that they regularly hibernated, during the cold weath- 

 er, sinking into the mud at the bottom of ponds, like 

 frogs, or curling up in deep, warm crannies, like bats, and 

 remaining torpid until revived by the warmth of spring. 



