no 
BIRDS OF COLORADO. 
all the plains region in a few days. The females arrive about 
a week later than the males. Begins to migrate south late in 
August and disappears the latter part of September. 
607. Piranga ludoviciana. lyOUisiANA Tanager. 
Summer resident; common. In migration occurs on the 
plains for 50 to 75 miles east of the foothills. It is common at 
Pueblo, but 80 miles east of there at Fort Lyon, Capt. P. M. 
Thorne did not see one • in five years’ residence. It was taken 
however at Finney County, southwest Kansas as a rare straggler, 
May 20 and June i, 1893. During the breeding season it deserts 
the plains and is common at 10,000 feet. Few breed below 
7,500 but some as low as 6,000 feet. Arrives on the plains the 
middle of May and moves into the mountains early in June. 
Breeds the last of June and remains in the mountains until 
September. The last leave the State late in October. 
[608. Piranga erythromclas. ScarleT Tanager. 
A male was taken by Mr. Bond at Cheyenne, Wyo., May 28, 1889. (Auk, 
VI. 1889, 341.) The bird is common a little farther east, but has no Colorado 
record. This individual may have crossed Colorado to reach Cheyenne, which 
is just over the Colorado line, or it may have passed westward up the Platte]. 
6ioa. Piranga rubra cooperi. Cooper’s Tanager. 
Summer visitant; rare or accidental. A southern species 
common in New Mexico and Arizona, but scarcely coming north 
to Colorado. Only one specimen known, taken by Henshaw at 
Denver, May 10, 1873. (Henshaw, 1875, 239.) 
611. Progne subis. Purple Martin. 
Summer resident; not common and local. Appears to be 
almost entirely lacking along the eastern slope of the Rocky 
Mountains and the plains at their base. As common in Utah 
as in the east and not uncommon in the extreme western part 
of Colorado. Again to the eastward, it is common in Kansas 
and extends a little way across the border into Colorado. In 
eastern Colorado, it arrives the last week of April and remains 
to breed on the plains. In western Colorado it arrives about 
the same time, but goes into the mountains for the summer, 
breeding from 6,000 to 8,000 feet; farther west in Utah it 
breeds both in towns on the plains and in the mountains. 
612. Petrochelidon lunifrons. Cliff Swallow. 
Summer resident; abundant. Breeds everywhere from the 
plains to 10,000 feet, nesting both on cliffs and under eaves. 
Arrives the last of April and first half of May. Breeds late in 
June. There is so long a time between its arrival and the be- 
ginning of nest building that breeding occurs at about the same 
time on the plains and in the mountains over the whole of 
Colorado. 
