From Monday about 10 of the territory's nature reserves will be closed from late afternoon until morning to enable the "conservation cull" of almost 2000 kangaroos.

This will take the total number of the eastern grey population culled over the past two years to almost 6000.

The government also sent out a strict warning to would-be protesters not to interrupt the cull.

Warning signs will be placed at all entry points to the reserves and surveillance cameras will be used to enhance public safety and detect illegal activity.

Upon hearing the news protesters have already said they will do whatever it takes to stop more kangaroo deaths and the authorities should not be surprised.

The ACT government might consider the conservation management policy a strong strategy but it is not just those fighting for animals' rights questioning the science behind it.

Arguments abound within the scientific community over the classification of "abundance" and overpopulation of the animals and the role that urbanisation has played in taking over habitat.

The work being done to come up with alternatives to what is considered by many as a cruel way to die cannot be done fast enough.

ACT Parks and Conservation director Daniel Iglesias said on Friday that while a fertility control vaccine was being trialled the cull was currently the most "humane" method of controlling the population.

That may be so but such a method is never going to win over the people who value the life of a living creature over the grass and land it is eroding.

While kangaroos and Canberrans live amicably enough most of the time in the bush capital there is no doubting the damage that can be done to each when paths align on the roads.

Like it or not there is an abundance of kangaroos in Canberra and under government policy the cull is the popular method of control.

While the government continues with this method it must not expect protesters will give up their strong opposition to the cull.