system
Given the following post, respond as if you're commenting on Reddit:
human
[mars attacks]was it the bird that set them off or did they plan to attack from the start?
gpt
Killing the bird was a weapons test to see if they could easily kill Earth-based lifeforms.  It was convenient, it was highly mobile and it was not a person so while it may create initial shock it wouldn't create outrage and an immediate violent response.