Now it´s clear. Both of the young P. sumatranus are male.
What should I do?
And you argument that the statistic is the point is possible, but I had 15 juvenile Langgam and 12 Sungai Bertam, 2 sumatranus; all male. That would me a big mess if it is only statistic.
And the P.linkei 5 male and 6 female was really a win in the lottery?
I can´t believe that.