Photo of P-22 in front of hollywood sign with recent photo of mange. Text: Support California Assembly Bill 2657. Photos by NatGeo and NPS.
Photo of sample support letter.


Assembly Member Bloom has authored AB 2657 to prohibit the use of rodenticides or products containing certain second-generation anticoagulants in environmentally sensitive areas, such as state parks. These harsh chemicals, intended to curb the rodent population, are working their way up the food chain and killing hundreds of wild animals — including wildlife like raptors, owls, coyotes and bobcats that would control the rodent population naturally.

Stop Poisoning California Wildlife with Anticoagulant Rodenticides

Assembly Bill 2657 prohibits the use of rodenticides or products containing certain second-generation anticoagulants in environmentally sensitive areas, such as state parks.

"Anticoagulants can have very negative effects on the local animals and plants that encounter them," said the bill author's, Assembly Member Bloom.

"Therefore, it is essential that our wildlife and ecosystems are protected from these harmful substances."

Anticoagulant exposure interferes with blood clotting, resulting in uncontrollable bleeding and death, even from a single feeding. Exposure can ripple through the food chain, spreading from smaller animals to the predators that feed upon them.

The Department of Fish and Wildlife has documented anticoagulant poisoning in at least 25 wildlife species in California alone, including foxes, black bears, and owls. More than 300 animals, including endangered species, have been killed by these poisons in California in the last two decades.

In the Southern California Mountain Lion Project, Dr. Winston Vickers reported that of the 30 deceased lions tested in the Santa Ana Mountains, all of them had from 1 to 5 of these harmful compounds in their systems. While the full impact these poisons have on lions is still unknown, two lions in the Santa Monica Mountains died directly from anticoagulant rodenticide poisoning.

Last month the famous Griffith Park mountain lion (named P-22) who was featured in National Geographic photographed in front of the Hollywood sign was recaptured by researchers. He was suffering from a bad case of mange and blood tests came back positive for rodenticides.

Latest Update on the Bill

AB 2657 passed the Assembly Water, Parks and Wildlife Committee on April 29, as well as the Assembly Appropriations Committee, with the help of 265 hand written letters from MLF supporters all over the state. Committee staff noted that these were the only letters from individuals in support of the bill. Organizations supporting the bill included Mountain Lion Foundation, Center for Biological Diversity, Sierra Club California, and HSUS.

The bill now is headed to the Assembly floor for a vote on Friday, May 23rd.

This is our last chance to demonstrate support for the bill before tomorrow's vote. Mountain Lion Foundation would very much appreciate it if before 5:00 p.m. pacific time today, you would make a brief phone call or send an email to your local Assemblymember. Ask your representative to vote YES on AB 2657 to ban rodenticides in wildlife habitats.

How YOU Can Help AB 2657

If you live outside California, please forward this page to your California friends and consider sharing it on Facebook.

Call or Email Your Local Assemblymember

If you live in California you can help by contacting your Assemblymember and telling him or her to vote in favor of AB 2657. The Assembly floor vote is on Friday, May 23. We are very short on time to demonstrate public support for the bill to help it advance through the Assembly side of the legislature.

A few minutes of your time could make a big difference for California's wildlife.

Photo of MLF Associate Director Lynn Cullens with 265 AB 2657 support letters.
MLF Associate Director Lynn Cullens delivers 265 hand-written letters to the committee hearing on Tuesday, April 29.

Click here to look up your legislators' contact information.

Please also send MLF a copy of your letters and emails. PO Box 1896, Sacramento CA 95812 or email it to Thank you!

Your email can be as simple as:

Dear Assemblymember and Senator,

Please vote YES on AB 2657 to ban poisons (anti-coagulants) in wildlife habitat areas.

add a sentence about why you care


print your full name and street address

Thank you so very much for taking the time to help protect California's wildlife!

About the Mountain Lion Foundation

The Mountain Lion Foundation, founded in 1986, is a national nonprofit organization protecting mountain lions and their habitat. The mountain lion is also known as cougar, puma, panther, and catamount.

We believe that mountain lions are in peril. Our nation is on the verge of destroying this apex species upon which whole ecosystems depend. Hunting mountain lions is morally unjustified, and killing lions to prevent conflicts is ineffective and dangerous. There is a critical need to know more about the biology, behavior, and ecology of mountain lions, and governments should base decisions upon truthful science, valid data, and the highest common good. Conserving critical lion habitat is essential.

Together, we can save America's lion.

Send Us Your Comments, and let us know what action you've taken. Thank you!

*Street Address:  
*Zip Code:  
Enter your message:

* Required

Please sign
up for our MLF Updates!

  Just check this box and we'll send you regular email updates and breaking news about Saving America's Lion.
  Contact me about volunteer opportunities. Your talents are valued as we work toward Saving America's Lion.
Click this box if you would like us to mail you a printed copy of our 11 by 17 poster WHERE DO WE GO FROM HERE? a graphic depiction of America's mountain lion history (mailing address required).

Join us today!

No minimum gift is required to become a member of the Mountain Lion Foundation. Just make the donation you can afford using any of the following methods. Click HERE to make a gift through PayPal, or mail your contribution to Mountain Lion Foundation, P.O. Box 1896, Sacramento, California 95812.

All personal information remains private and will not be shared with any third parties. Required information is collected to allow MLF to best respond to your questions or comments. Click HERE to see our privacy policy.

Donating online is safe and easy!

You can make a tax-deductible donation with your credit card using Paypal's secure server by clicking on one of the links below.

You may also mail your contribution to Mountain Lion Foundation, P.O. Box 1896, Sacramento, California 95812 or call us at 916-442-2666.

Additional options for making a gift are available by clicking HERE.

However you choose to contribute, you help to give mountain lions a voice. Thank you!