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兩隻成年的雄獅尾狒遠眺變遷中的地景。農業正逐步侵占衣索比亞的草原,氣候變遷又讓高地更適於農耕。在這麼多壓力環伺之下,像瓜薩這樣的保護區是否能繼續留存?Photographs by Jeffrey Kerby and Trevor Beck Frost
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獅尾狒擠在一起取暖。要從草、草本植物和種子攝取夠多的卡路里得耗費很大的功夫,所以獅尾狒大部分的時間都蹲坐著,靠挪動屁股移動,這讓牠們的手得以空出來摘取更多草。Photographs by Jeffrey Kerby and Trevor Beck Frost
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瓜薩的獅尾狒具高度社會性,但是到了分娩時經常離群索居,以避開其他猴子的攻擊性行為,並保持安靜以躲避掠食者。Photographs by Jeffrey Kerby and Trevor Beck Frost
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毛髮蓬鬆的雄性獅尾狒在早晨從東非大裂谷上方的峭壁往上攀爬時停下休息。獅尾狒是全世界唯一的草食性猴子,有數百隻獅尾狒在衣索比亞高地中部的這片高原上繁衍興旺,這裡的村民數百年來保護著當地的植物。Photograph by Jeffrey Kerby and Trevor Beck Frost