EPA Evaluation Highlights Threat of Rodenticides to Endangered Species

A recent review by the Environmental Protection Agency (EPA) has raised alarm over the impact of rodenticides on endangered wildlife, with at least 78 species being threatened by these toxic substances. The evaluation, released on Friday, assessed 11 common rodenticide ingredients used in pest control and agriculture, often unintentionally harming non-target animals, including some of America’s most iconic endangered species.

Jonathan Evans, environmental health legal director at the Center for Biological Diversity, emphasized the urgency of the issue, stating, “Rat poisons unintentionally kill some of America’s most iconic endangered species, like California condors, Florida panthers and black-footed ferrets… Steps to reduce harms to endangered species are critical to avoid pushing wildlife to extinction.”

The EPA’s evaluation outlines a set of proposed measures aimed at reducing these unintended poisonings. Among these are the requirement for bait stations designed to limit non-target animals’ access to the poison and restrictions on rodenticide use within the habitats of endangered species. These recommendations are part of a broader effort to address longstanding issues related to the endangered species review process.

These proposals are also a response to a legal agreement between the EPA and the Center for Biological Diversity following years of non-compliance with the Endangered Species Act. As part of this agreement, the EPA’s evaluation will now lead to a biological opinion from the U.S. Fish and Wildlife Service, which will further inform actions to mitigate the risks.

However, the protective measures won’t be enacted until final decisions are made on each of the 11 rodenticide ingredients. Evans stressed that the proposals are a significant step forward, noting, “The EPA’s proposals are an important step to better protect endangered species and avoid continued lawsuits that have plagued the agency for violating endangered species laws.”

Rodenticides, particularly anticoagulant types, have become a major threat to wildlife. Studies show that 83% of tested bald eagles have been exposed to anticoagulant rodenticides, leading to frequent poisoning and death. In California, at least 38 species, including the San Joaquin kit fox and California condor, have been unintentionally poisoned by these chemicals. The risk extends to human health as well. The American Association of Poison Control Centers reported over 8,500 cases of rodenticide poisoning in 2021, with children making up the majority of the victims.

Fortunately, safer alternatives to rodenticides exist. Less-toxic options and effective traps are available, and for more information on these, the SafeRodentControl.org website provides helpful resources.

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