A young dromedary camel peeks underneath its mother as she casually drinks in the Guelta Arche, a steep canyon in the Chadian Sahara.

• 格尔塔是乍得撒哈拉沙漠里一个陡峭的峡谷，骆驼妈妈正在悠闲的饮水，一只年幼的单峰骆驼躲在后面偷看。