ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by @beverlyjoubert / Water is the source of life … but for the unwary, it can also be a source of great danger. Grazers in these parts navigate a fine line between sustenance and safety. Each day is full of decisions that can lead to precious food and water … or into the crosshairs of a whole host of predators just waiting for their chance to strike. A scene of peaceful stillness as a hot day’s thirst is quenched can quickly transform into ambush—in crocodilian shape from below, or the well-timed pounce of a big cat from the sidelines. As the zebra bends down to drink, encoded deep into its being is the grave need for vigilance. #zebra #atthewaterhole #africanwildlife」12月20日 20時38分