Life.

Ants have the best work ethic despite the fact they have no vacation days, no sick days, no personal days, no health insurance, no bonuses. Yet ants have the best employment ratings next to Google.

Condemned slaves of the underworld I believe have the same work ethic as ants. They work far underground for a cause they don't truly understand with no real employment benefits. It's really an eternal sweat shop.

I think the best group of mammals besides the Amish to work together are beavers. They have a terrific sense of structure. Also they build with a purpose that reason being for a family and future.

I often think the only creative animals in the entire kingdom are the ones that have musical talent. Singing birds, chirping crickets, and so on and so forth. Unless you count killing as an art form than I think the Anaconda would dominate that market.