[40]“Useful Birds and Their Protection,” E. H. Forbush, pages 259 & 260.
[41]From “Birds of Eastern North America,” by Frank M. Chapman.
[42]Educational Leaflet No. 59.
[43]Farmers’ Bulletin 513, U. S. Department of Agriculture, Bureau of Biological Survey.
[44]Educational Leaflet No. 59, National Association of Audubon Societies.
[45]From “Birds of Eastern North America,” by Frank M. Chapman.
[46]From “Useful Birds and Their Protection,” by E. H. Forbush, pp. 65 and 17.
[47]From “Useful Birds and Their Protection,” by E. H. Forbush, page 370.
[48]Farmers’ Bulletin 506, U. S. Dept. of Agriculture, Biological Survey.
[49]From “Under the Maples,” by John Burroughs, p. 55.