How could they have evolved from pack hunters when there was so little landmass?

Domestic dogs inherited complex behaviors from their wolf ancestors, which would have been pack hunters with complex body language.

In olden times-as now among the nomads of the north-they were pack hunters.

Unlike the solitary graboids, shriekers are pack hunters, using their numbers to bring down large prey.

Tuvok joined them and Vale in making for the nearby trees, firing back at the pack hunters as they ran.

While the creatures could cross that distance in an amazingly short time, their nature as pack hunters didn't give them a lot of endurance.

But 'Geusians were a race of pack hunters living out their lives on ships and space stations.

Some pack hunters have tactics based on sophisticated teamwork, with each animal playing a specific role.

This all goes back to velociraptors being pack hunters, doesn't it?

Large groups of carnivores are usually called packs, and in nature a herd is classically subject to predation from pack hunters.