Noting we are entering the annual protest cycle, some real world numbers should be applied from last year regarding the kangaroo population in the local reserves.

These figures are derived from scientific papers, including from anti-cull sites, so I have approached the modelling from an agnostic perspective.

Females Eastern Greys can live up to 18 yrs in the wild. They are reproductive from 2 yrs of age and they can carry 3 young at different stages of development (quiescent blastocyst, pink, furred) with two in the pouch at any one time.

Using a progressive model over a 9 yr cycle, one female will be responsible for up to 62 genetically linked progeny. The sex difference runs at 1 male to 2 female. There are no natural predators.

In a population of 150 in Year 1 (much than we see in the Reserves but easy to split into 50 male and 100 female), the 9 yr cycle would result in an average of 6200 head.

Again, there is no natural predators. Males are forced out of the mob at age 2 to 4. They have to find space or cross roads. Adaptive evolution would model a refusal to do the road crossing noting the high mortality. Alpha males are forced out at the end of their useful breeding age due to sexual competition.

So there is the problem the Government has to deal with.