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In the world of bug control, there’s a term for accidental victims: nontarget insects.

“The nontarget insects have not been studied well enough,” said Doug Tallamy, a professor of entomology and wildlife ecology at the University of Delaware and a leader in the growing effort to support ecosystems by planting native species in yards.

“We need some sort of outside check to make sure that that the industry is thinking about risks to nontarget organisms and humans when it comes to pesticidal compounds. I feel better with the EPA looking at this.”

Since 2015, the zoo, which breeds condors for the wild population, has worked to reduce lead exposure in "nontarget" wildlife, primarily raptors.

Among the potential problems they explored were the possibility that the gene drive could spread to valued nontarget species, leading a decline in their density or in the health of ecosystem services to which they contribute.