[80]“Birds of a Maryland Farm,” by Sylvester D. Judd—Bulletin 17, Biological Survey.
[81]Farmers’ Bulletin 506, U. S. Dept. of Agriculture, Biological Survey.
[82]Bulletin No. 37, U. S. Dept. of Agriculture, Biological Survey.
[83]“Useful Birds and Their Protection,” E. H. Forbush, page 324.
[84]Farmers’ Bulletin 513, U. S. Dept. of Agriculture, Biological Survey.
[85]“Life Histories of North American Birds,”—Maj. Chas. Bendire.
[86]Educational Leaflet No. 19, National Association of Audubon Societies.
[87]From “The Home Life of Wild Birds,” by Francis H. Herrick. Used with the permission of the author, and of his publishers, G. P. Putnam & Co.
[88]From “Useful Birds and their Protection,” by E. H. Forbush.
[89]From “Useful Birds and Their Protection,” by E. H. Forbush.