Rodenticides and Wildlife

Scroll down to read about what rodenticides are, and the 7 steps you can take to rodent control…

Rodenticides is a general term for any rat or rodent poison. They come in many forms- pellets, granules, blocks and others. Sometimes it is housed in bait boxes and sometimes it is scattered. Different kinds of rodent poisons are harmful in different ways but ALL rodenticides are harmful to pets and wildlife. Rodents do not die instantly after ingesting poison contained inside bait boxes, but usually die days to weeks after the first ingestion instead. They become lethargic and are easy prey items for predators. Raptors and other wildlife provide free, natural and abundant rodent control! If you use any type of rodenticide- you will cause secondary poisoning (often lethal) to wildlife and/or domestic animals and pets...

By helping raptors thrive you will help to keep the predator-prey balance in our ecosystems in check. *A Barn Owl will eat 4-6 voles or vole sized rodents a night. A pair of nesting Barn Owls feeding a family of 6 will consume almost 40 rodents per night...one poisoned rodent can kill an entire family of owls.

The best rodent control in encouraging natural predation and using exclusion methods to secure your home or business. 

-ORC's rodenticide information flyer- Click here. 

-Download flyer in Spanish here. 

-Link to Raptor Boxes and Perching Page. 


A breakdown of rodenticides...

1st and 2nd generation rodenticides are anticoagulants. 2nd generation rodenticides are stronger and work faster than 1st generation rodenticides which can take 1-2 weeks to kill an animal, once ingested.

Toxicant rodenticides like bromethalin have no antidote. wildlife and pets poisoned by toxicant rodenticides have extremely high mortality rates.


Wildlife and pets are regularly affected…

For smaller bodied wildlife and pets, ingestion usually proves fatal…

Adult coyote with mange. When large mammals ingest and accumulate rodenticides in the their body over time, it weakens their immune systems and makes it hard for them to fight an otherwise common mange infestation, causing them to lose the majority of their hair, develop sores, and become fatally ill from the parasite instead.

Adult coyote with mange. When large mammals ingest and accumulate rodenticides in the their body over time, it weakens their immune systems and makes it hard for them to fight an otherwise common mange infestation, causing them to lose the majority of their hair, develop sores, and become fatally ill from the parasite instead.

Great Horned Owlet suffering from uncontrolled bleeding.

Great Horned Owlet suffering from uncontrolled bleeding.

Griffith Park P-22 suffering from rodenticide-induced mange infestation.

Griffith Park P-22 suffering from rodenticide-induced mange infestation.

Coyote puppy suffering from mange.

Coyote puppy suffering from mange.

Abdominal bleeding in a pet dog after ingesting rat poison.

Abdominal bleeding in a pet dog after ingesting rat poison.


What you can do- 7 steps to rodent control

Rodents thrive in human populated environments and destructive infestations often must be controlled but non toxic methods requires multiple strategies and patience to be successful. While attracting natural predators can be the most attractive and sustainable method of rodent control, some things should be considered before installing Owl and Kestrel boxes.

As outlined in the 7 Steps to Non-Toxic Rodent Control by the Hungry Owl Project as a practical approach to rodent control:

  1. Exclusion

  2. Prevention

  3. Trapping

  4. Work together

  5. Be an advocate

  6. Research

  7. Beneficial Predators

Exclusion & Prevention

The most important steps to natural rodent control for homes, businesses and storage is exclusion and prevention. Removing any food and nest sources such as exposed trash bins, dense vegetation, and other examples illustrated below. Thoroughly inspecting for and sealing off any entry points for rodents should always be prioritized or the structure will continue to experience rodent infestations. There are various kinds of materials available that can be used on different substrates to prevent rodents from re-entering structures and causing further damage.

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Successfully identifying all possible entry points and excluding your home of a rodent infestation can be overwhelming, and there are plenty of professionals that can help. Some offer non-toxic heat treatments to flush the vermin out of the walls of a structure before sealing up the entry points. Here is a list of some environmentally friendly companies that provide rodent and pest control services. Another one that is local to our community that we know about is Spectrum Environmental Pest but if you search for exclusion services and environmentally friendly pest control you are likely to find some local results wherever you are based. Sealing up entry points should be done before and immediately after this process in order to be effective.

trapping & Research

Once the rodents have been removed, excluded and prevented from re-entering your home it is important to be diligent about keeping areas clean, continually checking for droppings and setting traps. Old fashioned snap traps are effective if you keep them clean and change bait regularly. Electronic zap traps are also effective when kept clean and refreshed with bait regularly.

Luckily with the growing knowledge about the lethal effects of rodenticides on wildlife and our ecosystem there is also a growing demand for effective non-toxic alternatives which means there are constantly new products being introduced to the market and new studies being conducted about rodenticides. Here are just a few innovations in rodent control technology

In 2017 our Organization participated in a Raptor Pilot Study for Levee Protection conducted by the Ventura County Public Works which has finally provided us with quantitative evidence that proves natural predators are a more effective at controlling rodent populations than bait boxes.

Be an advocate & work together

Rodent problems are a community issue. While using bait boxes may seem like a convenient solution because it involves little effort on our part, “convenience” at the expense of our environment is really not convenient at all. Unfortunately most people are uninformed about rodenticides and the harm they cause. Large businesses, hotels, markets, malls, schools, restaurants and HOAs almost all use rodenticides and a lot of times management is under the false impression that using bait boxes is standard practice for industry with no real alternatives. It is our hope that the more people become informed of the truth about rodenticides that more people will take action, become advocates and raise awareness. If you notice that a local business is using bait boxes consider writing a letter like this example courtesy of Poison Free Malibu who is also a fantastic resource for information about rodenticides.

Aside from being toxic to wildlife, pets and our shared environment, the use of rodenticides also creates an expensive dependency on pest control companies to continuously keep bait boxes filled with poison. Any alternative method will save a significant amount of money which will be an attractive talking point when trying to persuade a business to stop using bait boxes. Sometimes identifying and correcting the main attractor / problem can be an easy solution. Poison Free Malibu reported on the case of Pepperdine University that was spending $29,940 annually with the use of bait boxes provided by a pest control company, and saved $14,940 after transitioning to natural methods bringing their annual cost of pest control down to $15,000.

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Making the transition from using rodenticides to natural pest control can take effort and be time consuming but by remaining patient and persistent and sometimes working with your local officials you can bring about awareness and positive change to your community for generations to come.

FINALLY - beneficial predators

Once you have eliminated and excluded rodents from your home, cleared the premises of any bait boxes and *make sure none of your neighbors are using rodenticides, you can install raptor perches and Barn Owl boxes to attract these natural predators to do what they are naturally born to do! A family of Barn Owls (from a single nesting box) can consume 3,000 to as many as 5,000 rodents in a single 4 month breeding cycle. One adult Barn Owl can consume 500 Gophers a year. They prey on Gophers, Rats, Mice, Rats, Voles, Moles and more. Barn Owls are cavity nesters and are easy to attract to a location by installing nest boxes.


Raptors on the job!

Thank you for reading, please help us spread the word about rodenticide use and its very harmful effects on our wildlife and pets.

Rodenticide Chart courtesy of cdpr.ca.gov

More resources at R.A.T.S. (Raptors are the solution)