What produces a poison that will harm animals try to eat it?

The answer is: poison dart frogs.

Poison dart frogs are a group of frogs that are found in the tropical rainforests of Central and South America. They are brightly colored, and their skin contains a poison that can be harmful to animals that try to eat them. The poison is produced by glands in the frog's skin, and it is released when the frog is threatened.

The poison of poison dart frogs is a complex mixture of alkaloids. These alkaloids are neurotoxins, which means that they can affect the nervous system of animals. The poison can cause paralysis, respiratory failure, and even death.

Poison dart frogs are not aggressive, but they will defend themselves if they are threatened. If an animal tries to eat a poison dart frog, the frog will release its poison. The poison will then be absorbed through the animal's skin or mucous membranes.

The poison of poison dart frogs is not harmful to humans if it is not ingested. However, it is important to avoid contact with the frogs' skin, as the poison can be absorbed through the skin.