This is a curious if a bit saddening story kids. Man is truly the most destructive species on the planet. This is a cautionary tale of how we are driving the planetary Eco system to destruction. Slowly and surely the natural world is being compressed heavily. Polluted to kingdom come. Over fishes. Over mined. Over engineered.
One day literally we will end up with a blighted world. Not a fun thing. That's why kids, make sure that you reduce, reuse and recycle. And try to make sure that your footprint is low. It helps :)
But I still hate the bloody pigeons.
Jonathan Rosen: Why the Passenger Pigeon Became Extinct