What method is appropriate for treating a zoo or aviary?

The appropriate method for treating a zoo or aviary is biological control, which involves using natural predators or parasites to manage pest populations. This method is particularly suitable in sensitive environments like zoos or aviaries, where the safety of the animals is paramount. Biological control minimizes the risk of harm to the animals, the ecosystem, and the environment, making it a preferred approach.

In contrast, chemical spraying and fumigation could pose significant health risks to the animals, as many chemicals can be harmful or even lethal to various species. Additionally, the residue left from chemical treatments could disturb the habitat and welfare of the animals. Heat treatment, while effective for certain pests and pathogens, may not be feasible in an aviary or zoo setting, as it could harm the delicate temperature and humidity requirements that many animals need to thrive. Therefore, biological control offers a balanced and ethical approach for pest management in these environments.