[LeoSolaris]

What makes you think that ants cannot perceive humans?

We show up just fine to their senses, as evidenced by their consumption of our flesh when given a chance. Leave a body close to the right ant mound, and you will have a skeleton in fairly short order.

[user-on1]

we are just a material to them.

they don't know we are humans and what we are capable of?

they don't know what we are.

[asnyc]

They absolutely do - take an ant and put it in your palm, it will frantically run around trying to get off you.

Similarly, if an intergalactic monster comes to Earth, I am sure we will be fully perceptive of them :)