Key behaviours / activities to look out for this month are:
Adult males are especially active during the first part of the month.
Bucks and does regularly seen together (often for days at a time), during the rut.
Fawns more regularly seen with their mother.
Bucks are frequently seen moving around the range during the rut. Territoriality makes them lose a lot of their normally, cautious nature.
Pre-oestrus does emit pheromones that pull in the virile bucks like iron filings to a magnet.
You can photograph them moving around together across the range.
The amorous doe will lead her attendant male on a merry dance, sometimes round in circles, or a figure-of-eight path. This is known as a doe ring.
Finally, after many hours of chasing, resting and more chasing - normally stretching over a period of days - she will eventually stand still and allow him to mount her.
The parental does continue to feed heavily.
As they continue to nurse their youngsters.