The black rats were successfully eradicated from Anacapa Island by 2003, with a controversial program that involved an aerial application of the rodenticide brodifacoum, the first such eradication in the United States. (en.wikipedia.org)
Non-target species mortality and the measurement of brodifacoum rodenticide residues after a rat (Rattus rattus) eradication on Palmyra Atoll, tropical Pacific. (cambridge.org)
In fact, it's made with Brodifacoum, one of the most powerful poisons available on the market. (geekwrapped.com)