What do you call an animal that likes to live in a group?

There isn't one single word for an animal that likes to live in a group. However, there are many terms depending on the specific type of group and the species:

General terms:

* Social animal: This is the most general term for any animal that lives in a group and interacts with others of its species.

* Gregarious animal: This term implies a preference for living in a group and being in close proximity to others.

Specific terms:

* Flock: Used for birds.

* Herd: Used for large mammals like cattle, elephants, or buffalo.

* Pack: Used for wolves, dogs, or other canine species.

* Troop: Used for primates like monkeys or apes.

* Colony: Used for insects like ants or bees.

* School: Used for fish.

* Pod: Used for dolphins and whales.

* Pride: Used for lions.

The best term to use depends on the specific animal and the type of social group it forms.