10 years after the arrival of human colonists on Mars, we we are beginning to see the start of the extinction of the natives ("Marshies") - though there are oddballs on both sides that believe the two species can coexist.
Fact sheet.First published: F&SF, November 1962.
Download full text from Internet Archive.
Included in Ellen Datlow's SciFiction's classics.
Related: Martian fiction.