The ban language is gone
The Trump administration has reopened the federal file on M-44 sodium-cyanide devices, the spring-loaded poison traps critics call cyanide bombs. Public Domain first reported that an April 2026 memorandum between the Bureau of Land Management and USDA APHIS Wildlife Services removed the Biden-era language that barred the devices on BLM-managed public lands.
E&E News reported that BLM confirmed the memorandum and described M-44s as restricted-use pesticide tools that may be considered under existing law and environmental review. That is the administration's official caution line: the memo itself is not a blanket order to deploy every device everywhere. It still moves the system from a clear prohibition to a case-by-case pathway.
M-44s are poison ejectors
BLM's own 2024 bulletin describes an M-44 as a spring-loaded device staked into the ground and loaded with a sodium-cyanide capsule and bait. When an animal triggers it, the device ejects cyanide into the biting animal's mouth.
The same bulletin says death can occur within one to five minutes. That is not a cage trap, relocation tool, or targeted dart. It is a baited chemical weapon placed into a shared landscape.
The 2023 BLM ban followed a documented risk record
The Biden-era BLM policy did not come from nowhere. BLM's February 2024 information bulletin said the amended 2023 MOU prohibited M-44 devices that deliver sodium cyanide on all BLM-managed public lands.
The bulletin also referenced a 2017 Idaho incident in which a teenager accidentally triggered an M-44 on BLM land, killing his dog and injuring him, and another incident involving a recreationist who triggered a device and suffered long-term injury.
The affected land base is enormous
BLM says it manages about 245 million acres of public land, primarily across the West and Alaska. That makes the reversal more than a technical change between agencies.
Public land is where ranching, hiking, hunting, dogs, children, wildlife habitat, and federal predator-control programs overlap. Once a poison device returns to that map, the risk is no longer confined to a private livestock contract.
Wildlife Services data shows the scale
USDA Wildlife Services publishes annual Program Data Reports, and conservation groups have used those records to track M-44 deaths. The Center for Biological Diversity says Wildlife Services poisoned 6,543 animals with M-44 cyanide bombs in 2023, including 156 unintentional deaths.
Those totals sit inside a larger federal wildlife-killing program aimed mainly at protecting agriculture and livestock interests. The public pays for the program, public land carries part of the hazard, and the animals killed are usually native predators, especially coyotes and foxes.
EPA restrictions still leave poison on the land
EPA's 2019 revised interim decision kept sodium cyanide registered for M-44 predator-control devices while adding restrictions. The agency required a 600-foot buffer around most residences and increased the distance from designated public paths and roads to 300 feet.
Those buffers reduce some exposure risk, but they do not change the core design. The device still waits for an animal to pull a baited trigger, and a dog, protected wildlife, or person can still enter the wrong patch of land.
The administration is calling it review, opponents call it reversal
Interior told Public Domain that the MOU identifies restricted-use pesticides as tools that may be considered under existing law and environmental review, with advance notification to BLM and continued case-by-case authority to prohibit or restrict use.
Opponents read the same memo differently. Their case is straightforward: when a document removes a categorical ban and replaces it with notification and review, the practical effect is reopening the door to deployment.
Canyon's Law is the legislative pressure point
Congress already has a live vehicle for this fight. S.2179, Canyon's Law, would prohibit M-44 devices on public land. Its findings say at least 42 people have accidentally triggered cyanide bombs causing exposure and injuries since 1984.
The bill would replace agency discretion with a statutory prohibition. That is the real policy fork: leave M-44s available through agency review, or remove them from public lands entirely.
The choice is coexistence or cyanide
The political sales pitch is familiar: predators threaten livestock, so the government needs lethal tools. But M-44s do not solve the underlying conflict between ranching and wildlife. They externalize danger onto public land and kill animals drawn to bait.
A government that can manage grazing permits, carcass removal, fencing, range riders, guard animals, compensation programs, and nonlethal deterrents has better tools than a spring-loaded cyanide ejector. Reopening BLM land to those devices is a deliberate choice for the crudest tool in the box.
Sources & records
Reviewed by Standards Review. Updated May 22, 2026.
- Public Domain On The April 2026 BLM-APHIS Memo
Original reporting that published and described the April 2026 memorandum, including Interior's response that M-44 use would be evaluated case by case.
- E&E News By POLITICO On BLM Confirmation
Reporting that BLM confirmed the memorandum and said M-44 devices may be considered under existing law and environmental review.
- BLM Information Bulletin IB 2024-024
Official BLM bulletin describing the amended 2023 MOU, the prohibition on M-44 devices on BLM-managed lands, device mechanics, and prior injury history.
- BLM 2020 MOU Press Release
Official BLM page for the 245 million-acre BLM land base and prior BLM-APHIS Wildlife Services partnership framing.
- EPA Revised Interim Decision For M-44 Predator Control Devices
Official EPA release for sodium-cyanide registration status, restricted-use pesticide framing, registrants, and distance/signage restrictions.
- APHIS Wildlife Services Program Data Reports
Official USDA Wildlife Services portal for annual program data reports by year.
- Center For Biological Diversity Cyanide Bombs Campaign
Used for 2023 M-44 death totals, unintentional-kill context, and the group response to the 2026 reversal.
- Congress.gov Text Of S.2179, Canyon's Law
Current 119th Congress bill text that would prohibit M-44 devices on public land and includes congressional findings on human exposures.
- Project Coyote May 2026 Response
Advocacy response describing the April 2026 memo as a reversal of the Biden-era BLM prohibition and calling for public-land protections.
