[50]Prof. D. Treadwell.
[51]Mr. Chas. W. Nash.
[52]Farmers’ Bulletin 630.
[53]From Olive Thorne Miller’s “First Book of Birds.”
[54]From “Birds of Village and Field,” by Florence Merriam.
[55]Used with permission of the Houghton Mifflin Co., the authorized publishers.
[56]Used with permission of the Houghton Mifflin Co., the authorized publishers.
[57]Farmers’ Bulletin 755, Biological Survey, U. S. Department of Agriculture.
[58]“Notes on New England Birds,” Thoreau, p. 311.
[59]Farmers’ Bulletin 630, U. S. Dept. of Agriculture, Biological Survey.