The most beneficial extinction, and more favourite, in North American history may have happened by 1904.
The Rocky Mountain locust went from an estimated 12.5 trillion insects, the largest swarm of animals ever recorded, to zero in less than 30 years.
Witnesses said the swarms were so dense they blocked out the sun for hours, sounding like a passing freight train decades before trains reached much of the prairie.
Then…they simply vanished.