Almost all Gibbon skeletons that are found in the wild have signs of healed fractures and breaks. Which indicates while injured they must be cared for (such as having food brought to them) while the bones heal, though that isn't evidence that they understand they are providing medical care so much as bringing food to their partner who can't/won't
danby t1_iz4f0u9 wrote
It's moderately well observed that animals appear to engage in behaviours that are self-medicating
https://en.wikipedia.org/wiki/Zoopharmacognosy
Almost all Gibbon skeletons that are found in the wild have signs of healed fractures and breaks. Which indicates while injured they must be cared for (such as having food brought to them) while the bones heal, though that isn't evidence that they understand they are providing medical care so much as bringing food to their partner who can't/won't
https://en.wikipedia.org/wiki/Gibbon