. The birds of eastern North America : known to occur east of the ninetieth meridian. Birds -- North America. 266 KEY TO THE BIRDS OF NORTH Tree Swallow. Entire underpants, white ; upper plumage, metallic steel blue; \ ouug bird< have the upper plumage brownish gray, but the uuder plumage is pure white. White-bellied Swallow. Tree Swallow. Tachycineta bicoJur. See No. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble
. The birds of eastern North America : known to occur east of the ninetieth meridian. Birds -- North America. 266 KEY TO THE BIRDS OF NORTH Tree Swallow. Entire underpants, white ; upper plumage, metallic steel blue; \ ouug bird< have the upper plumage brownish gray, but the uuder plumage is pure white. White-bellied Swallow. Tree Swallow. Tachycineta bicoJur. See No. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cory, Charles B. (Charles Barney), 1857-1921. Chicago : Field Columbian Museum
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectbirdsnorthamerica
