H.R. 4951House117th Congress (2021-2023)In Committee

Canyon’s Law

Introduced August 6, 2021

AI-Generated Summary

Updated February 8, 2026 at 6:13 AM UTC

Canyon's Law would ban the use of M-44 cyanide devices—commonly called cyanide bombs—on any federal public land. It also orders any agency that has placed such devices to remove them within 30 days. The bill targets wildlife managers, land agencies, and anyone using these devices to control predators, aiming to protect people, non‑target wildlife, and endangered species.

Key Provisions

  • Prohibits preparing, placing, installing, setting, deploying, or otherwise using an M-44 device on public land.
  • Requires any federal, state, or county agency that has deployed an M-44 device on public land to remove each device within 30 days of the law’s enactment.
  • Defines “M-44 device” as any device designed to propel sodium cyanide when triggered by an animal, including devices commonly called “M-44 ejector” or “M-44 predator control” devices.
  • Defines “public land” as any federal land managed by agencies such as the National Park Service, U.S. Fish and Wildlife Service, Bureau of Land Management, Bureau of Reclamation, or Forest Service.

Legislative Activity

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5 earlier actions
HouseCommittee Latest Action

Subcommittee Hearings Held.

July 21, 2022

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HouseIntro Referral

Introduced in House

August 6, 2021

HouseIntro Referral

Referred to the Committee on Natural Resources, and in addition to the Committee on Agriculture, for a period to be subsequently determined by the Speaker, in each case for consideration of such provisions as fall within the jurisdiction of the committee concerned.

August 6, 2021

HouseCommittee

Referred to the Subcommittee on National Parks, Forests, and Public Lands.

August 19, 2021

HouseCommittee

Referred to the Subcommittee on Water, Oceans, and Wildlife.

August 19, 2021

HouseCommittee

Referred to the Subcommittee on Conservation and Forestry.

August 30, 2021

HouseCommittee

Subcommittee Hearings Held.

July 21, 2022

Floor Debate

1 member

What members said about H.R. 4951 on the floor

1 Democrat
Frank J. Mrvan
Rep. Frank J. MrvanD-IN-1 · Jun 7, 2022

Mr. Speaker, I rise today in appreciation that H.R. 4951, the VA Electronic Health Record Transparency Act, legislation I introduced and was approved by the House last year, has now been approved by…

Bill Text

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Introduced in HouseIssued August 6, 2021

I

117th CONGRESS

1st Session

H. R. 4951

IN THE HOUSE OF REPRESENTATIVES

August 6, 2021

Mr. DeFazio introduced the following bill; which was referred to the Committee on Natural Resources, and in addition to the Committee on Agriculture, for a period to be subsequently determined by the Speaker, in each case for consideration of such provisions as fall within the jurisdiction of the committee concerned

A BILL

To prohibit the use of M–44 devices, commonly known as cyanide bombs, on public land, and for other purposes.

1.

Short title

This Act may be cited as Canyon’s Law.

2.

Findings

Congress finds the following:

(1)

Sodium cyanide is the highly toxic pesticide active ingredient used in M–44 devices, also known as cyanide bombs, and is used to kill wolves, coyotes, foxes, and wild dogs suspected of preying on livestock and poultry.

(2)

Sodium cyanide is registered for restricted use under the Federal Insecticide, Fungicide, and Rodenticide Act (7 U.S.C. 136 et seq.) as a Category One acute toxicant, the most hazardous Environmental Protection Agency classification available, due to the harm it poses to people and the environment.

(3)

Poisoning by sodium cyanide leads to central nervous system depression, cardiac arrest, respiratory failure, paralysis, and blindness.

(4)

The Environmental Protection Agency authorizes the use of M–44 devices nationwide, and in recent years, M–44s were used in Colorado, Idaho, North Dakota, Nebraska, New Mexico, Nevada, Oklahoma, Texas, Utah, Virginia, West Virginia, and Wyoming.

(5)

In 2017, an M–44 device exposed an Idaho child to a sublethal dose of sodium cyanide with subsequent short-term and long-term medical complications. Two Wyoming children were also exposed to the poison from another M–44 device. Three family dogs died in these two separate incidents.

(6)

The indiscriminate M–44 device commonly harms nontarget wildlife and people; at least 42 people have accidentally triggered a cyanide bomb causing exposure to cyanide gas and injuries since 1984.

(7)

M–44 devices kill targeted animals only 53 percent of the time. Thousands of nontarget species of animals have been killed by M–44s, including bald eagles, golden eagles, gray wolves, black bears, grizzly bears, bobcats, fishers, and family dogs.

(8)

Despite the United States Fish and Wildlife Service determining in 1993 that M–44 devices could kill endangered species like the California Condor, the use of the M–44 continues in areas where endangered species are found and continues to result in the deaths of endangered species.

3.

Use of M–44 devices on public land prohibited

(a)

In general

Preparing, placing, installing, setting, deploying, or otherwise using an M–44 device on public land is prohibited.

(b)

Removal

Not later than 30 days after the date of the enactment of this Act, any Federal, State, or county agency that has prepared, placed, installed, set, or deployed an M–44 device on public land shall remove each such M–44 device from public land.

(c)

Definitions

In this Act:

(1)

M–44 device

(A)

In general

The term M–44 device means a device designed to propel sodium cyanide when triggered by an animal.

(B)

Common names

The term M–44 device includes any device that may be commonly known as an M–44 ejector device or an M–44 predator control device.

(2)

Public land

The term public land means any Federal land under the administrative jurisdiction of a public land management agency.

(3)

Public land management agency

The term public land management agency means each of, or a combination of, the following:

(A)

The National Park Service.

(B)

The United States Fish and Wildlife Service.

(C)

The Bureau of Land Management.

(D)

The Bureau of Reclamation.

(E)

The Forest Service.