A muscular kangaroo performs in front of females. According to observations by kangaroo experts from Murdoch University…

A muscular kangaroo performs in front of females. According to observations by kangaroo experts from Murdoch University and Curtin University, this is normal - males often demonstrate their biceps to the fair sex, the size of the shoulder is one of the signs by which female kangaroos choose a partner. What a powerful supporting tail he has ))