Some species can be very long and form kelp forests.

Some species form large colonies of up to 40 paired individuals.

The species forms a short shrub, three or four feet high.

Some species form colonies consisting of several hundred workers in the soil.

At times, they follow their schooling prey, and many species form schools themselves.

Most species form schools as juveniles, but generally become more solitary with age.

These two species of willow can also form natural hybrids with each other.

The species apparently form several discrete groups, at least one of which does certainly not belong here.

The species does not form large schools or undertake long migrations.

Some species form packs or live in small family groups depending on the circumstances, including the type of available food.