I keep an ant colony as a pet. Ants are pretty much indestructible creatures from a physical point of view - they need infinitesimal amounts of food and water to survive, they don't get sick or hurt, but they're very succeptible to stress. They're nervous creatures and go nuts from stress, acting in illogical and even suicidal ways.

Is it because their primitive brains go haywire? Or is this just our mammalian prejudice speaking? Who knows.

Probably best not to anthropomorphize any animal, I think.