The social insects-move and live all their lives, in a mass; other species travel in packs or schools, and share the food, but any single one can survive solitary, detached from the rest.
It is not a simple thing to decide where we fit, for at one time or another in our lives we manage to organize in every imaginable social arrangement. We are as interdependent, especially in our cities, as bees or ants, yet we can detach if we wish and go live alone in the woods, in theory anyway.
hazelnut-of-life 