WORLD NEWS
Monkeys hug and care for other animals: 427 cases reviewed
Researchers compiled 427 cases in which monkeys and apes played with, groomed, held or carried animals of other species. Dogs, deer, pigs and birds appeared among the partners.
This does not prove that primates keep pets in the human sense. It suggests that curiosity, tolerance and caregiving across species may have deep evolutionary roots.
Who interacted with whom?
The review covered 88 primate species and 127 partner species. Play was recorded 139 times and grooming 136 times. Young primates played most, while adult females groomed more often.
Was there an obvious reward?
Mixed-species groups can help with food or safety, but some primates cuddled, carried and rested with other animals without a clear practical reward.
Was every encounter friendly?
No. Rough handling and apparent abduction also occurred, and 13 partner animals died. The authors caution against simply projecting human pet relationships onto every case.
Why does it matter?
Caregiving and playful interest in another species may predate humans. The patterns could also help zoos and sanctuaries manage mixed-species groups more safely.
Official primary sources
Primary source: Oxford University official research release