- Lonesome George
- Ecuador ()
The Abingdon Island giant tortoise Geochelone elephantopus abingdoni is represented by a single living specimen, an aged male called `Lonesome George', making it the world's rarest reptile. With little hope of discovering another specimen, this particular subspecies of Galapagos giant tortoise is effectively extinct while still alive, unless cloning techniques can generate future replicas of George.
Lonesome George is also the most endangered animal.