Final answer:
The central idea of the section 'On the Hunt' is the impact of human activity on wildlife populations.
Step-by-step explanation:
The central idea of the section 'On the Hunt' (paragraphs 5-8) is the impact of human activity on wildlife populations. Two details from the article that support this idea are the mention of the decline in bird and animal populations due to hunting and the description of the negative consequences of overhunting on ecosystems.