Burros on the range

2020 Outside Cibola-Trigo Nuisance Gather — Imperial and Cibola National Wildlife Refuges

[Gather Complete]

Purpose of Gather

The purpose of this gather is to remove nuisance burros that are damaging wildlife refuge and private property and creating a public safety hazard for motorists along roadways. The Bureau of Land Management (BLM) has received complaints of natural resource loss, infrastructure damage and destruction, and concerns about human health and safety by the U.S. Fish and Wildlife Service in the Imperial and Cibola national wildlife refuges and adjacent private property owners.

Details of Gather

The BLM plans to remove 150 nuisance burros from the Imperial National Wildlife Refuge and 150 nuisance burros from the Cibola National Wildlife Refuge including adjacent private land outside the Cibola-Trigo Herd Management Area (HMA) between the months of September and November 2020, via bait trapping, water trapping, or both.  A contractor and BLM staff will set temporary traps on refuge and private lands, and will remove the panels, hay and manure once the trapping is complete. For the purpose of this gather no burros will be treated with fertility control.  All trapping operations will be overseen by the Yuma Field Office.

Public Observation

There will be no public viewing opportunities for this gather due to the nature of the gather.

Adoption Information

How to Adopt

Animals removed from outside the Cibola-Trigo HMA will be made available for adoption at the Florence Wild Horse and Burro Training and Off-Range Corral in Florence, Arizona, through the Wild Horse and Burro Adoption Program. Those that are not adopted will be cared for in off-range pastures, where they retain their “wild” status and protection under the 1971 Wild Free-Roaming Horses and Burro Act.


The Cibola-Trigo HMA is in southwestern Arizona, north of Yuma. The area parallels the eastern shoreline of the Colorado River for approximately 60 miles from Yuma to Ehrenberg. The estimated population for this HMA as of March 2020 is approximately 616 wild burros and 275 wild horses based on various analytical population count data and reports.

Gather Reports


[Gather Completed]

Contractor: Cattoor Livestock LLC 

Gather Method: Bait trap 

Planned Gathered (#): 300 burros

Planned Removed (#): 300 burros

Planned Mares Treated (#): 0

Current as of: September 30, 2020

Animals Gathered

September 11
10 burros  (8 jennies, 2 colts)

September 12
1 burro  (1 jack) 

September 13
no burros

September 14
10 burros  (3 jacks, 4 jennies, 3 colts)

September 15
59 burros  (40 jacks, 12 jennies, 7 foals)

September 16
51 burros  (15 jacks, 29 jennies, 7 foals)

September 17
21 burros 

September 18-21
0 burros  

September 22
20 burros  (1 jacks, 14 jennies, 5 foals)

September 23
9 burros  (3 jacks, 3 jennies, 3 foals)

September 24
27 burros  (7 jacks, 15 jennies, 5 foals) 

September 25
15 burros  (9 jacks, 4 jennies, 2 foals)

September 26
29 burros  (21 jacks, 7 jennies, 1 foals) 

September 27
12 burros  (6 jacks, 4 jennies, 2 foals) 

September 28
21 burros  (7 jacks, 8 jennies, 6 foals) 

September 29
5 burros  (1 jacks, 2 jennies, 2 foals) 

September 30
15 burros (4 jacks, 7 jennies, 4 foals)


Total Animals Gathered: 305

Total Animals Released: 5

Total Deaths Cumulative (#): 1

  Acute (#): 1

  Chronic/Pre-existing (#):

List animal’s age, color, gender and cause(s) of death: September 23: 1 female ran in to the panels at the trap site and fractured neck.  

Facility Destination: shipped to Florence

  • 56 burros on September 16
  • 96 burros on September 17
  • 28 burros on September 24
  • 61 burros on September 29
  • 58 burros on September 30  

Total Released Cumulative (#): 5