Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 637
THE BLUEBIRDS ARE FIRST TO RETURN IN SPRING. why any of the birds migrate. It is not alto-gether the food-supply, because many birds,which subsist on insects, begin to leave this coun-try in late July and August, just when their food-supply is most plentiful. Neither is it altogether … BROOD OF ROBINS. for climatic reasons, for many birds,geese, ducks, robins, bluebirds, andnorth before winter has really ended such as wildothers, come, often meet- 19.] AN ARMY OF OBSERVATION 485
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