Linked from
The 16 pages that link to Fission–fusion society, each with the reason it gives.
African wild dogRelated: Wild dog packs travel together but divide temporarily while foraging.
BaboonRelated: Baboon troops can divide into smaller foraging parties and regroup.
Oceanic dolphinRelated: Many oceanic dolphins form fluid groups rather than fixed, permanent pods.
Ring-tailed lemurRelated: Their groups can divide into smaller foraging parties and gather again.
Plains zebraRelated: Plains zebra herds form larger or smaller groupings as conditions change.
Squirrel monkeyRelated: Squirrel monkey troops can divide into smaller foraging groups and regroup.
UakariRelated: Uakari groups can divide into smaller foraging parties and later regroup.