though a longer and minuter examination would undoubtedly have
resulted in the discovery of a few species that are peculiar to the
regions beyond the range. In the extreme western and southwestern
portions of Colorado there are quite a number of species that are seldom
or never seen in the eastern part of the State. However, keeping to the
mountainous districts, and given the same altitude and other conditions,
you will be likely to find the same kinds of feathered folk on both
sides of the range. A few concrete cases will make this statement clear.
The elevation of Glenwood is five thousand seven hundred and fifty-eight
feet; that of Colorado Springs, five thousand nine hundred and
ninety-two feet; and the climatic conditions otherwise are practically
the same. Hence at both places the following species were found: Lazuli
buntings, Arkansas goldfinches, American goldfinches, western
wood-pewees, Arkansas kingbirds, Bullock's orioles, grassfinches, and
catbirds. At the same time there were a number of species in both
localities that have a more extensive vertical range, as, for example,
the western robins, which were seen in many places from the bases of the
mountains up to the timber-line, over eleven thousand five hundred feet
above sea-level.

_ROYAL GORGE_

_In the Grand Canyon of the Arkansas River. In canyons like this, their
walls rising almost vertically from one thousand to fifteen hundred
feet, few birds are to be seen. Occasionally a dove will fly from one
side of the gorge to the other before the scurrying train. From below a
magpie or a Clark's crow may sometimes be seen flying overhead across
the fearful chasm from one wall to the other, turning its head at
intervals as if to inspect and question the spectator over a thousand
feet below._

[Illustration]

The presence of practically the same avian fauna on both sides of the
great range suggests some speculations as to their movements in the
migrating season. Do those on the western side of the mountains travel
over the towering summits from the eastern plains? Or do they come up
from their southern winter homes by way of the valleys and plains west
of the range? Undoubtedly the latter is the correct surmise, for there
were birds at Glenwood that are never known to ascend far into the
mountains, and should they attempt to cross the Divide in the early
spring, they would surely perish in the intense cold of those elevated
regions, where snow often falls