Insectivorous vertebrates such as rodents, skunks, and birds are examples of natural biotic control.

Insectivorous vertebrates like rodents, skunks, and birds play a significant role in the ecosystem by controlling insect populations through predation, which is an example of natural biotic control. This statement about these animals being agents of pest control is correct, as they feed on various insects and can help keep their populations in check, thus contributing to the overall balance of the ecosystem.

However, the correct response in this context would indeed be true. Natural biotic control refers to the regulation of pests through natural predators, parasites, or diseases. The animals mentioned actively participate in this process, thereby contributing to forest pest control.

In summary, the statement is correctly identified as true, as insectivorous vertebrates contribute to natural pest control by preying on insects, exemplifying the concept of biotic control in forest ecosystems.