The laws that were passed as a result of the muckraking literature of Upton Sinclair were <span>Pure Food and Drug Act of 1906 and Meat Inspection Act of 1906.</span>
The Portuguese sailors hunted and killed them for meat. Since the birds were flightless and fearless and did not make any attempts to flee, the sailors slaughtered them in large numbers.
The black bird tribe was a ancient and deadly tribe in the far northwest of america, Christopher Columbus himself stubbled upon these savages. They wore black paint and covered them selfs in blood when they killed an enemy, finally years later an earthquake hit the land they were living in and they were never seen again...
I don't know you have to study this.
One item can be the weapons. Many Europeans gave the natives a bunch of weapons because they had plenty. They even gave them faulty weapons or broken ones because the natives didn't know any better.