Activist groups yesterday urged a multipronged approach to curb Taipei’s rat population, warning that rodenticide overuse could lead to poison-resistant rats while killing natural predators such as birds of prey.
At a news conference at the legislature, representatives from Taiwan Walk for Wildlife, the Reptile Conservation Association of Taiwan and the Raptor Research Group called on the Taipei City Government to disrupt environments that sustain rodents, rather than relying solely on rodenticide.
According to the groups, rodenticide use could contaminate the food chain, killing raptors and snakes.
Photo: Liu Hsin-de, Taipei Times
The resulting decline in these natural predators, combined with rodents’ rapid reproduction, could lead to a surge in the rat population.
Citing data from 2021 to 2024, Raptor Research Group of Taiwan member Tsai Dei-hua (蔡岱樺) said that more than 61 percent of examined raptor carcasses showed traces of rodenticides.
Tsai added that in the Taipei and Keelung areas, 92 percent of sampled crested goshawk carcasses tested positive for the chemicals.
Long-term and widespread use of rodenticides without targeted application may lead rodent populations to develop resistance, Tsai said.
Democratic Progressive Party Taipei City Councilor Ho Meng-hua (何孟樺) said Taipei still uses the rodenticide bromadiolone, which saw resistance reported within a few years of its 1976 introduction.
“Indiscriminate and widespread use of rodenticides not only risks toxin accumulation in predators, but may also contribute to the emergence of rodent populations with increased resistance — potentially leading to so-called ‘super rats,’” she said.
Liu Jhen (劉鎮), a PhD candidate at Academia Sinica’s Biodiversity Research Center, said global rodent control trends emphasize source prevention, or improving environmental conditions, over chemical methods.
On Monday, Taipei Environmental Protection Bureau Director Shyu Shyh-shiun (徐世勳) said the city uses rodenticides approved by the central government and follows the Ministry of Environment’s guidelines for deployment.
He said that rodenticide is placed in areas where rats are active or may enter buildings, such as warehouse corners, cluttered storage areas, wall crevices and around burrows.
“The city does not engage in indiscriminate application of rodenticide,” he said.
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