From Wikipedia for "ant": "More than 12,500 of an estimated total of 22,000 species have been classified."
From our human perspective, we are interested in ants. Everybody has seen ants. Everybody is curious about ants.
From an ant perspective, humans scarcely exist. There are 10,000 ant species that don't have a relationship with humans sufficient to deserve classification, let alone a name.
(I also want to wonder aloud why extra-terrestrials would be more interested in humans than in ants)