I.together [美 təˈɡɛðər, 英 təˈɡɛðə]副together often appears as the second element of certain verb structures in English (band together, go together, piece together, etc). For translations, see the relevant verb entry (band, go, piece, etc).
The swarmites can huddle together for strength and speed boosts, stack on top of one another to reach high obstacles, and jump as a group to reach certain areas.
Fearing that they are both going to die as no one knows where they are, they eventually huddle together to keep warm, but are both very weak from the cold.
Furthermore, groups of people can huddle together in this position to conserve body heat, offer moral support and provide a larger target for rescuers.