一項長達 15 年的研究顯示，雌性婆羅洲猩猩會為了讓年齡相近的幼崽彼此玩耍，而不惜跋涉更遠的距離。這些猩猩大部分時間都過著獨居生活。牠們為了與其他幼崽見面而付出額外的時間與能量成本，顯示同伴間的遊戲對幼年猩猩發展必要的運動技能和社交能力至關重要。

A 15‑year study shows that female Bornean orangutans will travel significantly farther so their offspring can meet and play with other youngsters of similar age. These orangutans are largely solitary, so the additional time and energy invested in seeking out playmates highlights how important peer play is for developing essential motor and social skills in young orangutans.

https://brieflynews.io/articles/orangutan-mothers-plan-playdates-offspring-mrhjsm0r