THE STUDY OF BIRDS OUT-OF-DOORS. 



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in March and April ; still, the height of the breeding season is not 

 reached until June 1st. 



Another period in the avian year closely connected with the 

 spring migration and nesting time is the song season. Near New 



Song Sparrow. 

 Swamp Sparrow. 



York city it is inaugurated late in February by the Song Spar- 

 row. Voice after voice is added to the choir, and in June our 

 woods and fields ring with the chorus so dear to lovers of Nature. 

 By the middle of July it is on the wane, and early in August it is 

 practically over. Some birds have a brief second song season in 



