Northeast Greenland supports a large indigenous population of musk-oxen (Ovibosmoschatus). Radiocarbon dating of remains of this mammal collected on the terrain surface and from archaeological sites has yielded mid- and Late Holocene ages. The species probably arrived shortly before this part of Greenland became inhabited by the first hunter cultures. Only Late Holocene dates are available from the southern part of northeast Greenland, but the authors suggest that musk-ox spread south to this region at an early date, because there are no physical barriers. The lack of older dates may reflect the lack of palaeo-Eskimo sites with bones.