THE STUDY OF BIRDS OUT-OF-DOORS.
669
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 Sparrow. 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
