What could humans have done to prevent the extinction of the passenger pigeon?

To prevent the extinction of the passenger pigeon, humans could have implemented conservation measures, such as establishing protected habitats and regulating hunting practices to ensure sustainable populations. Education and awareness campaigns about the species' ecological importance might have fostered public support for protective actions. Additionally, early intervention in breeding programs could have helped maintain genetic diversity and bolster population numbers. Lastly, restricting the commercial exploitation that led to unsustainable hunting levels would have been crucial.