Mountain-Prairie Region
 

12-MONTH ADMINISTRATIVE FINDING, BLACK-TAILED PRAIRIE DOG

Table 1. Summary of Estimates of Black-tailed Prairie Dog Occupied Habitat in Various Areas for Selected Dates (estimates in thousands of acres)

State or Country

Historic

BSFW (1961)

Other Recent

Mulhern & Knowles (1995)

Knowles (1995)

BFFRF Survey

(1998)

States 1998

Knowles (1998)

USFWS (1999)

Arizona

650 (AGF&P)

0

0

0

0

0

0

0

Colorado

3,000 (Clark 1989)

7,000 (Knowles 1998)

96

89 in 1979 (Van Pelt in prep.)

<100

326

973 in 1990 (CO Dept Ag)

44

93

Kansas

2,000 (Lantz 1903)

2,500 (Knowles 1998)

50

57 (Smith 1958)

36 (Henderson & Little 1973)

47 (Vanderhoof & Robel 1992)

47

47

147

36

42

Montana

1,471 (Flath & Clark 1986)

6,000 (Knowles 1998)

28

125 (Flath & Clark 1986)

>100 (Campbell 1989)

88

88

66 (MT FW&P)

65

65

Nebraska

6,000 (Knowles 1998)

30

15 in 1971 (Lock 1973)

60

60

80

60-80 (NE G&P)

60

60

New Mexico

>6,640 (Bailey 1932)

17

137 (Bodenchuck 1981)

497

107

15

39

North Dakota

2,000 (Knowles 1998)

20

>7 (Grondahl 1973)

10 (Stockrahm 1979)

25 in 1999 (Sidle pers. comm.)

21

20

15

30 (ND G&F)

20

25

Oklahoma

950 (Knowles 1998)

15

10 (Tyler 1968)

15 (Lewis & Hassien 1973)

18 (Shackford et al. 1990)

8.6 in 1999 (Lomolino in litt.)

10

70

18 (OK Dept WC)

<9.5

9

South Dakota

1,757 (Linder et al. 1972)

33

37 in 1967 (Henderson et al 1974)

60 in 1968 (Rose 1973)

700 in 1980 (Tschetter 1988)

184 in 1987 (Tschetter 1988)

147 in 1999 (Sidle pers. comm.)

247

245

175

231 in 1996 (SD GF&P)

245

147

Texas

58,000 (Bailey 1905)

26

>13 (Cottam & Caroline 1965)

90 (Cheatheam 1977)

>68 (Lair & Mecham 1991)

30

227

23

71

Wyoming

16,000 (Knowles 1998)

49

133 in 1971 (Clark 1973)

204

131-204

422

131-204 in1987(WYG&F)

362 (WY Dept Ag)

70-180

125

United States

111,000 (Knowles 1998)

364

1,359

1,686

677

676

Canada

1.5-2 (Knowles 1998)

1.9 (Millson 1976)

1.6 (Laing 1986)

2.3 (Fargey pers. comm. 1998)

2

2

Mexico

1,384 (Ceballos et al. 1993)

136 (Ceballos et al. 1993)

90

90

N. America

104,000 (Anderson et al. 1986)

99,000-247,000 (Miller et al. 1996)

384,000 (Seton 1953)

769

768

 

1 Bureau of Sport Fisheries and Wildlife (1961).

2 Black-footed Ferret Recovery Foundation phone survey, September 1998.

3 State Agency responses to 1998 petition and 90-day finding.

4 Fish and Wildlife Service’s best estimate of current occupied habitat (1999).

5 Includes all prairie dog species present.

Table 2. Geographical Information System Estimation of Potential Black-tailed Prairie Dog Occupied Habitat (in acres).

 

State

Total Range

Croplands Within Range

Grass/Shrub Within Range

Potential Habitat

20 Percent of

Potential Habitat*

Arizona

8,516,730

345,862

6,635,691

6,981,553

1,396,311

Colorado

33,151,600

11,601,300

15,621,810

27,223,110

5,444,622

Kansas

38,136,400

27,839,336

9,676,833

37,516,169

7,503,234

Montana

66,140,400

15,841,388

37,496,108

53,337,496

10,667,499

Nebraska

46,719,300

25,578,936

19,526,548

45,105,484

9,021,097

New Mexico

53,838,600

2,536,731

42,213,264

44,749,995

8,949,999

North Dakota

11,357,400

5,808,501

5,194,639

11,003,140

2,200,628

Oklahoma

24,849,900

15,953,241

7,170,891

23,124,132

4,624,826

South Dakota

35,036,500

13,921,928

18,131,964

32,053,892

6,410,778

Texas

93,048,100

23,558,038

59,957,784

83,515,822

16,703,164

Wyoming

37,354,300

3,477,034

25,452,430

28,929,464

5,785,893

Total

448,149,230

146,462,295

247,077,962

393,540,257

78,708,051

 

* It has been estimated that historically, approximately 20 percent of all potential habitat was inhabited by the species at any given time (Whicker and Detling 1988).

 

Table 3. Listing Priority Guidance for the U.S. Fish and Wildlife Service (48 FR 43098).

Magnitude of Threat Immediacy of Threat Taxonomy LPN
High Imminent Monotypic genus 1
    Species 2
    Subspecies/population 3
       
  Non-Imminent Monotypic genus 4
    Species 5
    Subspecies/population 6
       
Moderate to Low Imminent Monotypic genus 7
    Species 8
    Subspecies/population 9
       
  Non-Imminent Monotypic genus 10
    Species 11
    Subspecies/population 12

 

Table 4. Region 6 Listing Priorities as of November 1999.

SPECIES

LEAD OFFICE

STATUS

LISTING PRIORITY

Proposed Species

Colorado Butterfly Plant

Cheyenne, WY

Proposed (T)

March 24, 1998

 

Desert Yellowhead

Cheyenne, WY

Proposed (T)

December, 22, 1998

 

Lynx

Helena, MT

Proposed (T)

July, 8, 1998

6-month extension to January 2000

Mountain Plover

Grand Junction, CO

Proposed (T)

February 16, 1999

 

Pending Proposed Rule

2 plant species

 

Previous Candidates

Proposed rule submitted to WO

Court Orders

Virgin River Chub Critical Habitat

Salt Lake, UT

Court-ordered designation due January 20, 2000

 

Piping Plover Critical Habitat

Pierre, SD

*In settlement negotiations

 

Candidate Species

Sicklefin Chub

Bismarck, ND

Candidate (petitioned)

2

Sturgeon Chub

Bismarck, ND

Candidate (petitioned)

2

Fat-whorled (Bonneville) Pond Snail

Salt Lake, UT

Candidate

2

Sleeping-Ute Milk-Vetch

Lakewood, CO

Candidate

2

Boreal Toad

(Southern Rocky Mtn population)

Grand Junction, CO

Candidate

(warranted but precluded)

3

Arkansas Darter

Manhattan, KS

Candidate

5

Graham Beardtongue

Lakewood, CO

Candidate

5

Parachute Beardtongue

Lakewood, CO

Candidate

5

White River Beardtongue

Salt Lake, UT

Candidate

6

Swift Fox

Pierre, SD

Candidate

(warranted but precluded)

8

Aquarius Indian Paintbrush

Salt Lake, UT

Candidate

8

Horseshoe Milk-Vetch

Salt Lake, UT

Candidate

8

* Action pending. Settlement could require completion of critical habitat for this species in a timeframe which would preclude completion of other listing actions.