| From there, the species has radiated into several subspecies, two of which occur in Europe and share a hybrid zone. |
| The allopatry of Middle American subspecies, and their diversification, may be attributable to habitat preferences. |
| Based on these specimens, the races of two species of buttonquail were revised and five new subspecies described. |
| Japan's Iriomote cat was recently demoted from a distinct species to an island subspecies of leopard cat. |
| A California quail and a Bewick's wren are among four bird subspecies found only on Santa Catalina. |
| A quarter of all Asian elephants are held in captivity, including 9-15 per cent of the total population of the Sumatran subspecies. |
