BLM Wyoming manages 16 wild horse herd management areas on nearly 5 million acres. The combined appropriate management level for all HMAs in the state is 3,725 animals.

Since 1971, the BLM has removed approximately 37,000 animals from public rangelands in Wyoming.

CLAIM: Animals removed from public rangelands are offered to the public for adoption; un-adopted animals are cared for on open pastures for the rest of their lives.  The reality of that claim – coming soon

WYOMING STATE OFFICE







GET THE WORD OUT, MAKE SOME NOISE



Appropriate Management Level (AML) of horses and burros per Herd Management Area (HMA)

Animal Management Unit (EST AMU) = Current individual population estimates on entire HMA,

HINT: How to read EST AMU:    ( ? = yes, needs actual animal #’s / 0 = none / blank = unknown)

#  ?  horses    #  0 burros   #   cattle   #   sheep


ADOBE TOWN HMA

  • 478,000 acres
  • AML:     610-800            
  • EST POP             #  ?  horses    # 0  burros   #  cattle   #  sheep

3 other roundups with salt wells took place in 2010, 2013 and 2017 as well as the one below.

In 2017 Adobe Town gather, Original herd size ? / 89 Removed / 89 returned / 0 deaths

/ Animals Treated with Fertility Control 0  / mares collared ? / –  (mar 17 2013)

ANTELOPE HILLS HMA

  • 159,000 acres  both public and private lands
  • AML:   60-82              
  • EST POP             #  ?  horses    # 0  burros   # ? cattle   # ? sheep

CHECKERBOARD COMPLEX

– Area includes Adobe Town, Salt Wells Creek and Great Divide Basin HMA

CHECKERBOARD AREA gather

  •  ?   acres
  • AML:                 
  • EST POP             #    horses    #   burros   #  cattle   #  sheep

In 2014 Original herd size ? / 1263 Removed / 0 returned / 14 deaths –  (9/15-10/9/14)

This checkerboard wild horse removal is not a population management action related to appropriate management levels. Instead, the 1971 Wild Free-Roaming Horse and Burro Act, Section 4 requires that the BLM remove wild horses from private land if requested by the land owner. This removal also complies with the court-ordered 2013 Consent Decree between the BLM and the Rock Springs Grazing Association which directed that all wild horses be removed from checkerboard lands within the HMAs. Not removing all wild horses from the checkerboard would result in non-compliance with the Act and Consent Decree.

Details of Gather:

Removal of all wild horses from checkerboard lands began on September 15. Appeals and motions delayed removal operations, allowing more wild horses to move across the fluid boundary between solid block public lands and the checkerboard in preparation for winter and in search of water; thus, the population estimate for the checkerboard was surpassed by the number of wild horses actually removed.

CROOKS MOUNTAIN HMA

  • 58,000 acres
  • AML:  65-85               
  • EST POP             #  ?  horses    # 0 burros   #  cattle   #  sheep

DIVIDE BASIN HMA

  • 778,915 acres, of which 562,702 acres are BLM-administered public lands. 
  • AML:  415-600               
  • EST POP             #  ? horses    # 0  burros   # ? cattle   # ? sheep

Domestic cattle and sheep use the area lightly in summer and moderately in winter.

https://www.blm.gov/programs/wild-horse-and-burro/herd-management/gathers-and-removals/wyoming/2011-greatdividebasin_reddesertcomplex_wild_horse_gather

In 2011 Great Divide Basin gather ,  Original herd size ? / 1,132 Removed / 139 returned / 3 deaths –  (10/9-11/21/11)

FIFTEENMILE HMA

  • 81,000 acres
  • AML:  100-230               
  • EST POP             # 107 ? horses    # 0  burros   #  cattle   #  sheep

The first recorded wild horse gather on federal rangeland took place in October, 1938 on lands that now make up the Fifteenmile HMA. 

In 2019 Fifteenmile gather, Original herd size 700 / 607 Removed / 95 returned / 11 deaths –  (Oct 17, 2019) 1-2 weeks

*Approximately 12 horses were not gathered, leaving approximately 107 horses total in the HMA as of 2019

GREEN MOUNTAIN HMA

  • 117,000 acres
  • AML:     170-300             
  • EST POP             #  ?  horses    # 0  burros   #  cattle   #  sheep

The area supports significant wildlife populations of elk, deer, pronghorn, bighorn sheep and moose.

LITTLE COLORADO HMA

  • 632,000 acres
  • AML:    69-100             
  • EST POP             #  ?  horses    #  0 burros   # ? cattle   # ? sheep

Domestic cattle and sheep utilize the area lightly in the summer and moderately in the winter.

In 2011 Little Colorado gather, Original herd size ? / 224 Removed / 56 returned / 3 deaths –  (8/20-8/31/2011)  part of the White Mountain/Little Colorado gather

LOST CREEK HMA

  • 251,000 acres
  • AML:    60-82             
  • EST POP             #    horses    #   burros   #  cattle   #  sheep

MCCULLOUGH PEAKS HMA

  • 120,344 acres
  • AML:  70 to 140               
  • EST POP             #  ?  horses    #  0 burros   #  cattle   #  sheep

In 2013 Mccullough Peaks gather, Original herd size 153 / 72 Removed / 45 returned / 0 deaths –  (1/21/ – 1/31/2013)

The AML of the McCullough Peaks HMA is 70 to 140 wild horses and the current population is 153 horses. The use of bait trapping to gradually remove excess horses through 2018 will help maintain a population of approximately 100 adult wild horses.

NORTH LANDER HMA COMPLEX

-includes ? hmas

  • 375,000 acres of land, of which about 90% are BLM-administered public lands
  • AML:  320-536               
  • EST POP             #  ?  horses    #  0 burros   #  cattle   #  sheep

While the four HMAs are managed with recognized individual populations, there is no geographic separation of the HMAs and the gates between them remain open a significant part of the year. As a result, the horses move regularly among the HMAs, helping to ensure the overall genetic health of the horses. Elk, deer and pronghorn inhabit this area.

In 2012 North Lander Complex gather, Original herd size ? / 754 Removed / 346 returned / 5 deaths –  (11/3 – 11/16/ 2012) cumulative totals

RED DESERT COMPLEX

– (includes the Antelope Hills, Crooks Mountain, Green Mountain, Lost Creek and Stewart Creek HMAs)

  •  complex encompass about 753,000 acres of land, of which 703,500 are BLM-administered public lands
  • AML:   480-724               
  • EST POP            #  ?   horses    #  0 burros   #  cattle   #  sheep

In 2011 Red Desert Complex  & Great Divide Basin gather

               Red Desert gather, Original herd size ? / 899 Removed / 374 returned / 7 deaths –  (10/9-11/21/2011)

—————

In 2020 Red Desert Complex gather, Original herd size 3000 / 1970 Removed / 197 returned / 10 deaths / Fertility Control 100 / –  (Oct 10, 2020, about 4-8 weeks)

SALT WELLS CREEK HMA

combine with adobe town / complex

  • 1,173,000 acres
  • AML:  251-365                
  • EST POP             # ?  horses    #  0 burros   # ? cattle   # ? sheep
  • supports significant wildlife populations including elk, deer and pronghorn. Domestic cattle and sheep use the area lightly in the summer and moderately in the winter, but primarily cattle use.

https://www.blm.gov/programs/wild-horse-and-burro/herd-management/gathers-and-removals/wyoming/

In 2010 Salt Wells and Adobe Town Complex gather, Original herd size ? / 2,269 Removed / 318 returned / 9 deaths –  date (no numbers for individual HMA – combined)

               This was a helicopter-assisted gather. It was initially estimated that approximately 1,950 wild horses would need to be gathered from both HMAs and that 1,580 excess horses would be removed; however, during a Sept. 2010 census flight, wild horse specialists found that the population of wild horses in the HMAs was greater than previously thought. In addition, wild horses which have migrated outside the HMAs will need to be gathered. As a result, approximately 157 additional horses will be removed from within the complex, and slightly more than 200 horses will be gathered outside the HMAs. 

Approximately 100 mares will be treated with the fertility-control vaccine Porcine Zona Pellucida (PZP) and released back into the HMAs.

Approximately 860 wild horses will remain in the HMAs, which is the appropriate management level (AML) for this herd complex.

https://www.blm.gov/programs/wild-horse-and-burro/herd-management/gathers-and-removals/wyoming/2013-adobe-town-salt-wells-wild-horse-gather

In 2013 Salt Wells and Adobe Town Complex gather, Original herd size ? / 668 Removed / 79 returned / 3 deaths –  (11/21- 12/4/2013)

An estimated 700 wild horses will be gathered from both HMAs and approximately 586 excess horses will be removed. Roughly 114 mares and studs are expected to be returned to the Complex. All mares released will be treated with the fertility control vaccine (40 Mares treated).

Approximately 57 mares will be treated with the fertility-control vaccine Porcine Zona Pellucida (PZP) and released back into the HMAs.

Approximately 851 wild horses will remain in the HMAs, which is the low appropriate management level (AML) for this herd complex.

https://www.blm.gov/programs/wild-horse-and-burro/herd-management/gathers-and-removals/wyoming/2017-at-swc-gdb-wild-horse-gather

In 2017 Salt Wells, Adobe Town and Great Divide Basin Complex gather, Original herd size ? / 1560 adults 408 foals Removed / 4 returned / 15 deaths –  sep 23-Oct 17, 2017

Of the 1,560 wild horses to be gathered, approximately 725 would be removed from the Salt Wells Creek HMA, 513 from the Adobe Town HMA and the 322 from the Great Divide Basin HMA.

Only adult horses count toward the 1,560 AML removal number.

STEWART CREEK HMA

  • 168,000 acres
  • AML:   125-175               
  • EST POP             #  ?  horses    # 0  burros   #  cattle   #  sheep

WHITE MOUNTAIN HMA

  • 393,000 acres
  • AML:     205-300             
  • EST POP             #  ?  horses    # 0 burros   # ? cattle   # ? sheep

Supports significant wildlife populations including elk, deer and antelope. Domestic cattle and sheep utilize the area lightly in the summer and moderately in the winter.

https://www.blm.gov/programs/wild-horse-and-burro/herd-management/gathers-and-removals/idaho/2011-whitemtn-littlecolorado-wild-horse-gather

In 2011 White Mountain Original herd size ? / 475 Removed / 149 returned / 8 deaths –  (8/20-8/31/2011)

In 2011 Little Colorado gather, Original herd size ? / 224 Removed / 56 returned / 3 deaths –  (8/20-8/31/2011)  part of the White Mountain/Little Colorado gather

This was a helicopter-assisted gather. The estimated population in the White Mountain/Little Colorado herd management areas (HMAs) is currently 970 wild horses. This figure is based on April 2010 census flights, adjusted for two years’ foal crop, and 14 percent unobserved wild horses. There are approximately 696 excess mustangs above the low AML.


This WYOMING HMA project will include gatherable information from a multitude of verified sources and combine it all together for a complete access point for wild horses of this state. It will show you FACTS and links to BLM, ROUNDUPS, MEDIA, ADVOCATES (on the ground), SANCTUARIES, NON PROFITS, YEARLY HISTORY, STATISTICS, RECORDS OF ABUSE, RESEARCH, POLITICS, CATTLE INDUSTRY, and any other important data for complete oversight in relation to the BLM’s activity related to the Herd Management Area’s of this nation’s wild horse herds.