footprints, tracks of a desert sandfish scincus, common skink at the erg chebbi sand dunes in morocco

africa animal arid bright chebbi chordata close closeup coldblooded common daylight desert dry endangered environment erg footprint habitat horizontal living lizard mark merzouga morocco natural nature nobody north passing path pattern reptile reptilian sahara sand sandfish sandy scaled scincus skink squamata surface terrain texture traces track trail walk wild wilderness wildlife zoology