[90]Farmers’ Bulletin 630, U. S. Dept. of Agriculture, Biological Survey.
[91]Farmers’ Bulletin 630, U. S. Department of Agriculture, Biological Survey.
[92]Farmers’ Bulletin 630, U. S. Biological Survey, U. S. Dept. of Agriculture.
[93]Used with permission of the Houghton Mifflin Co., the authorized publishers.
[94]From “Useful Birds and Their Protection,” by E. H. Forbush, page 348.
[95]Educational Leaflet No. 13, of the National Association of Audubon Societies.
[96]From “Useful Birds and Their Protection,” by E. H. Forbush, page 346.
[97]“Useful Birds and Their Protection,” E. H. Forbush, page 343.
[98]Farmers’ Bulletin 755, Biological Survey, U. S. Dept. of Agriculture.
[99]Farmers’ Bulletin 755, Biological Survey, U. S. Dept. of Agriculture.