To save wild crocodiles in Australia, scientists gave them food poisoning
Briefly

"It's not pretty. They go into seizures. And death is fairly quick and probably very painful because it's essentially a massive cardiac arrest."
"When they decline, we see this huge hole in the ecosystem, and this kind of ripples out and sets off cascading impacts. [...] cane toads do really cause ecological havoc here in Australia."
"It was a huge success. And it's now being deployed by Indigenous rangers and wildlife management agencies as we speak."
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