To describe an area like the New Forest as one of natural beauty is, at best, misleading. The distinctive nature of the forest is, to a significant degree, down to how man has interacted with the landscape. (as an aside, I would probably make this point about many national parks and so called areas of outstanding natural beauty)
The calendar of human activity in the New Forest helps to mark the passage of the year for the casual observer. Autumn means at least two things in this context.
First, it is the pannage season. 'Pannage' is one of the common law rights of the forest which those commoners, allowed by virtue of the property in which they live to exercise it, can do so, if they wish. It is the right to turn out to roam (the technical, New Forest term is 'depasture') pigs in the autumn. The start and finish dates for pannage are set each year and in 2021 they are from 13th September to 14th November. The reason why pigs are depastured is to eat the acorn crop. The pigs love them and thrive on them; by contrast, if eaten to excess, acorns can kill ponies. This year, the acorn crop appears to have been abysmal and I have only seen one group of pigs roaming free in the forest; they were at Eyeworth.
The other activity is rounding up the ponies which, contrary to popular belief, are not wild, but owned by commoners. The New Forest term for a round-up is a 'drift', though temporary road signs warn motorists of a 'pony round-up in progress'. I have chanced on one in action a few times over the years; it is spectacular to see, as the more able horsemen among the commoners ride on horseback to corale the ponies to the predetermined collection point. This is not a full proof process, as some don't get rounded up.
At the collection point, the agisters will be present; these are the forest officials responsible for the health and welfare of animals. They will check which mares have foals with them and add the latter to the register. The ponies' health will be checked and remedial action, if needed, will be taken (e.g. hoof trimming). The ponies used to be branded, and possibly still are. Perhaps most intriguingly, their tails will be trimmed at the bottom and on the sides, to a distinctive, coded stepped pattern which indicates to which part of the forest they belong.
Soon, there will be pony sales, for instance adjacent to Beaulieu Road Station, and for some ponies it will be the end of their time in the forest.
I knew there was a drift taking place the other week in the part of the forest nearest where I live as the car park I use almost daily as the start of the daily dog walk for Mrs WWD was, according to a sign, closed for a day to enable 'livestock management'. Oh dear, management-speak comes to the Forestry Commission; what's wrong with 'drift' or, if that seems too obscure, 'pony round-up'?