Fig. 1.

Illustrative map depicting the combined range of all red muntjacs (dark grey). The dashed line indicates the relative position of the Isthmus of Kra and the area indicated by dark grey lines indicates the relative position of the Western Ghats. Circles indicate sample origin according to colour and size is relative to sample size. Checkered patterns indicate contemporaneous samples, while solid colours indicate position of museum samples. * indicate samples for which only country of origin is available (See full samples details in Additional file 1: Table S1)