The whole article attached to the image is but four sentences long, in which the answer is clear. Yet s/he asks if a rock on Mars is a terrestrial bird! Assuming it isn't a child (for which I made explicit exception), this person is so far afield one might wonder if s/he isn't trolling.

So, the utility of the comment is to hope s/he and others who read it won't do the same thing (again) - post before reading or giving reasonable thought. Admonishment can be useful. Indeed, you're employing such yourself!