Rarest deer
- Who
- Bawean deer Hyelaphus kuhlii
- What
- 250 total number
- Where
- Indonesia
- When
- 11 November 2013
The rarest species of deer is the Bawean deer Hyelaphus kuhlii, which is confined entirely to the tiny Indonesian island of Bawean, situated off the northern coast of Java. Fewer than 250 mature individuals are believed to exist, and it is categorized as "Critically Endangered" by the IUCN.