This sounds like a macaque conflict where Jill and Dolly are aggressively confronting Dana and Daniela, with Dana being forced down or pinned underneath. Without seeing the actual video, the exact trigger is uncertain.
Possible reasons include:
- Social rank: higher-ranking monkeys may attack or intimidate lower-ranking individuals.
- Food or resources: competition can quickly cause aggressive fights.
- Group tension: previous conflicts or alliances can spill into new fights.
- Protection or dominance: one monkey may be trying to control another or defend its position.
- Mother–baby or family relationships: macaque groups can become especially aggressive when infants are involved.
