galápagos giant tortoise chelonoidis nigra eating grass

animal big bony brown chelonoidis coldblooded cryptodira cute domed eating ectothermic endangered endemic environment evolution exotic extinction fauna galapagos galaiexcl pagos giant grass has herbivores huge island islands large largest living mammal natural nature nigra outdoor pattern reptile reptilia reserve scute shaped shell slow species testudines testudinidae tortoise tropical turtle walk wild wilderness wildlife