The East Pershing Complex Roundup: Operational Details
A detailed analysis of the BLM's own internal database, a 193-page record containing individual entries for every horse captured, reveals that the human and animal cost of this operation extends far beyond the 44-day roundup window. As of the database's run date of March 5, 2026, 185 deaths have been recorded among the captured horses, with the most recent death occurring on February 18, 2026, more than two years after the roundup concluded
“Wild Horses Deserve Transparency” The Callaghan Complex Roundup of almost 5000 Wild Horses and Burros
The Callaghan Complex consists of:
Callaghan HMA *AML 134-237 - A designated Herd Management Area
Bald Mountain HMA *AML 129-215 - Adjacent to Callaghan HMA and often shares horse movements with nearby HMAs
South Shoshone HMA *AML 60-100 - Another nearby Herd Management Area that wild horses frequently move between with Callaghan and Bald Mountain.
Hickison HMA (The Hickison Summit Burro Range HMA) ( Northern Portion) * AML 16-45 - The plan includes the northern section of the Hickison HMA within the Callaghan Complex boundaries.
North Shoshone HA - Included in some BLM descriptions as part of the complex. Technically a Herd Area (HA) that may not be actively designated as an HMA but is considered within the planning boundary
Llimited depth perception in Wild Horses and the effects during roundups
Horses have limited binocular (forward-facing) vision and rely on head movement and reduced speed to accurately judge depth and terrain.
During helicopter gathers, wild horses are driven at sustained speeds across unfamiliar landscapes and are unable to stop, lower their heads, or visually reassess obstacles.
Under these conditions, reduced depth assessment increases the risk of misjudging terrain features such as washes, drop-offs, fencing, and trap wings, which can result in falls, collisions, and musculoskeletal injuries.