1997-06-13_REPORT - M1981302

• Permit No: M1981302
• IBM Index Class Name: Report
• Doc Date: 6/13/1997
• Doc Name: EXHIBIT A 10
• Media Type: D
• Archive: No

Zapus hudtonius preblei Interim Survey Guidelines, May 27, 1997 3
of occurrence of Preble's based on current and historical records of the subspecies. Surveys
are recommended where suitable habitat exists (below 7,400 feet elevation) within these areas:
a. Boulder, Douglas, El Paso, and Jefferson Counties in Colorado;
b. The South Platte River 100-year floodplain and tributaries (and their associated wet
meadow complexes) in Adams, Arapahoe, Denver, Elbert, Latimer, Morgan, and
Weld Counties, from the Front Range as far east as Fort Morgan, in Colorado; and
c. The North Platte River, South Platte River, and Lodgepole Creek 100-year floodplains
and tributaries (and their associated wet meadow complexes) east of the Laramie
Mountains and south of the North Platte River (northwest to Douglas) in Albany,
Converse, Goshen, Laramie, and Platte Counties in Wyoming.
3. HABITAT DESCRIPTION AND SITES REQUIRING A SURVEY
A definitive study of the ecological distribution of Preble's in Colorado and adjacent Wyoming
has never been conducted. Data suggest that habitats occupied by Preble's fall within the
broad description of habitats of the species, low undergrowth consisting of grasses, forts, or
both in open wet meadows and riparian corridors or where tall shrubs and low trees provide
adequate cover. It prefers lowlands with medium to high moisture over dry uplands. Preble's
is known to occur in agricultural, as well as natural, landscapes; in mesic vegetation along
irrigation canals as well as natural drainages, and in area dominated by introduced as well as
indigenous grasses and other plant species.
For a summary of information on habitat used by Preble's, please obtain a copy of"Report on
Habitat Findings of the Preble's Meadow Jumping Mouse' (1997, edited by Mark Bakeman),
available from the Service's Colorado Field Office.
Sites below 7,400 feet occurring within the areas described in Section 2 in or near wet
meadows (both natural and those created by seeps from man-made structures such as dams,
irrigation canals, etc.), native hayfields, stream channels (perennial and intermittent), riparian
habitats, or floodplains should be surveyed for Preble's.
4. SITES NOT REQUIRING A SURVEY
Some sites are either clearly not appropriate Preble's habitat or have very low potential to be
Preble's habitat. A survey for Preble's is not recommended for such sites. Sites (below 7,400
feet elevation) occurring within the areas described in Section 2 and falling within general
habitat guidelines as described in Section 3, which do not requiring a survey for Preble's
include:
a. Highly disturbed or modified sites such as: