dense fur; unlike the lesser mouse-deer the fur on the neck is coarser and less prickly. The Vietnam mouse-deer lacks the dark markings along the flanks and the middle portion of the underparts visible in the lesser mouse-deer. Ecology and habitat The 2019 camera-trap evidence suggests that Vietnam mouse-deer are diurnal (active mainly during the day), and stay solitary or form pairs. The locality where the 1990 specimen was obtained was a low-lying area of semi-deciduous tropical forest; several lesser mouse-deer specimens were found in the same area, suggesting sympatry. The 2019 study observed the Vietnam mouse-deer in dry lowland forest near the southern coast of Vietnam. See also References Tragulus Endemic fauna of Vietnam Mammals of Vietnam Mammals described in 1910 Taxa named by Oldfield Thomas