abstract age aged appearance armor armored armorment armour armoured armourment astrochelys-radiata carapace critically-endangered eating endangered feeding giant-tortoise herbivore hide large-tortoise leathery longevity Madagascar old pattern patterned plod plodding protection protective radiated-tortoise reptile reptilian rough scaly shell size skin slow strength strong texture textured textures tortoise tough zoo leaves meal Camouflage light mixed-light patchy shade shadows sunlight sunshine aldabra-giant-tortoise aldabrachelys-gigantea brown colors colours contours cover exterior grooves hard horny-plates layers lined lines outlines pointed points shelter solid amphibian animal animals aquarium aquatic background beauty color colorful cute green head lamp lamps life little looking nature omnivore pet pond small stone terrapin terrapins terrarium turtle warming water wild wildlife young