. The birds of El Paso County, Colorado . Birds. Plate Fig. 31- Western Tree Sparrow. Colorado Springs. £. R. ir., I' 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 Aiken, Charles Edward Howard, 1850-1936; Colorado College. Science series. [Colorado Springs : Published by the authority of the Board of Trustees of Colorado College

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, bookyear1914