“Quietus,” Ross Rocklynne, 1940 – Two birdlike aliens observe the last human male with a pet bird. Due to the bird’s similarity to their own form, they mistake the bird for the master and kill the human, whom they believe is attacking.
Comments: Last man story with a twist. Undermines deductive reasoning that relies on what is known about a “normal” body. Read in Adventures in Time and Space.
Author: Wikipedia: “Ross Rocklynne (February 21, 1913 – October 29, 1988) was the pen name used by Ross Louis Rocklin, an American science fiction author active in the Golden Age of Science Fiction.”