Individuals of P. maniculatus and of Reithrodontomys megalotis were caught ([Table 1]).
Table 1—Major Trapping Localities in Mesa Verde National Park, Colorado. Vegetational Key as Follows: 1) Pinyon-Juniper-Muttongrass 2) Pinyon-Juniper-Mixed Shrubs 3) Juniper-Pinyon-Bitterbrush 4) Juniper-Pinyon-Mountain Mahogany 5) Grassland with Mixed Shrubs 6) Big Sagebrush 7) Pinyon-Juniper-Big Sagebrush 8) Grassland.
| Locality | Date | No. trap nights | P. truei | P. man. | Type of vegetation |
| Morfield Ridge | Sept. 1961 | 1080 | 0 | 83 | 5 |
| Oct. 1963 | 360 | 0 | 13 | 5 | |
| S. of Far View | Oct. 1961 | 360 | 10 | 13 | 2 |
| W. of Far View | Oct. 1961 | 1080 | 22 | 17 | 2 |
| South Chapin Mesa | Nov.-Dec. 1961 | 3600 | 16 | 9 | 6 |
| East Loop Road | Jan. 1962 | 720 | 6 | 2 | 2 |
| Navajo Hill | May 1962 | 720 | 0 | 18 | 5 |
| Aug. 1964 | 20 | 0 | 2 | 5 | |
| Aug. 1965 | 50 | 0 | 8 | 5 | |
| N. Wetherill Mesa | May-June 1962 | 1080 | 0 | 57 | 5 |
| Bobcat Canyon Drainage | June 1962 | 360 | 0 | 0 | 6 |
| N. of Long House | June 1962 | 1080 | 3 | 4 | 1 |
| Mug House—Rock Springs | Aug. 1962 | 720 | 8 | 14 | 4 |
| Aug. 1963 | 720 | 9 | 7 | 4 | |
| S. Wetherill Mesa | Aug. 1962 | 720 | 0 | 5 | 3 |
| 1 mi. SE Park Entr. | June 1963 | 50 | 0 | 16 | 7 |
| 1/4 mi. SE Park Entr. | July 1963 | 100 | 0 | 7 | 8 |
| M-2 Weather Sta. | May 1964 | 25 | 2 | 0 | 1 |
| 8 mi. S North Rim Moccasin Mesa | Aug. 1964 | 100 | 0 | 3 | 8 |
| 10 mi. S North Rim Moccasin Mesa | Aug. 1964 | 25 | 2 | 0 | 2 |
Bobcat Canyon, a large secondary canyon on the eastern side of Wetherill Mesa, is a major drainage for much of the mesa at its widest part. The mesa top drains southeast into a pour-off at the head of Bobcat Canyon. A stand of big sagebrush, Artemisia tridentata, grows in the sandy soil of the drainage, and extends northwest for several hundred yards from the pour-off. The sagebrush invades the pinyon-juniper forest at the periphery of the area.
Two traplines were set in the drainage, with trapping stations at intervals of 25 feet. The lines traversed elevations of 7,000 to 7,100 feet, and were run from June 26 to 29, 1962.
Grasses are the most abundant plants in the ground cover. Artemisia dracunculus is common in the drainage, and A. nova grows around the periphery of the drainage. Other species occurring in this stand include: