RODENTICIDE PATHWAYS ALONG THE FOOD CHAIN
Rodenticides directly harm native wildlife such as bush rats, quenda and possums as well as their intended target of introduced rodents. They indirectly harm many more through ‘secondary poisoning’. Evidence is mounting that rodent baits are being eaten not only by the obvious candidates but also by reptiles, which themselves are quite resistant, and by invertebrates such as insects which are unaffected. This means that wildlife at risk of secondary poisoning includes owls, phascogales, brush-tailed possum, quenda, chuditch, mardo, dunnart, daytime birds of prey and insectivorous birds. Even if not directly killed by internal haemorrhaging, wildlife that have ingested rodenticides are more likely to hunt unsuccessfully, get ill, or be killed on roads.