A Muntjac deer with a very loud bark. This one was wandering through a field, I was observing him from the other side of a hedgerow, I'm guessing he detected my scent and became very alert, then he stamped the ground before starting to bark. The bark is either a call to identify their location (to other deer), a challenge to intruders or as a warning signal. The barking continued almost constantly for about 20 minutes, this video shows just a short period and the point at which the deer decided to venture off to another field.