1080 poison is a broad-spectrum insecticide.
It kills not only the insects that consume the poisonous baits or poisoned carcasses, but also the birds that eat the insects.
Bees are also at risk from the aerial poisoning operations. In this news story, a South Island bee-keeper explains why he is shifting his business to a remote area of the North Island. Since this story was released in 2014, many more of New Zealand's forests have been poisoned. Few forests now remain un-poisoned.