Fallow deer have a intermediate in size between roe and red deer. There are four main variations in coat but many minor variations also exist including a long-haired version found in Mortimer forest, Shropshire.

The common variety is the familiar tan/fawn colour with white spotting (becoming long and grey with indistinct spots in winter) on the flanks and white rump patch outlined with characteristic black horse-shoe.

The Menil variety is paler, lacks the black bordered rump and keeps its white spots all year. The black variety is almost entirely black with no white coloration anywhere.

The white variety can be white to sandy coloured and becomes more white at adulthood. This is a true colour variety and not albinism, which is rare. The fallow is the only British deer with palmate antlers.