Why have an ant colony when you can have a mean little thing that eats ants instead?
So far Olivia's etymological interests have been yelling "FRY!!!" every time she sees a butterfly (on anything... books, TV, clothes. I'm not sure she's actually seen a real one yet). Occasionally she'll say "bug!!!" when she sees some other creepy-crawly. We'll just have to see how the interest develops over time.