大象传媒

The rivalry between male black grouse is obvious. The males have their dancing courts alongside one another on the Scottish moors, and such closeness inevitably leads to quarrels. Such an arrangement, however, allows the females to make their assessments much more easily. Their decisions seems to be not only on the vigour of their dances or on their appearance of the males, but where they dance. The females prefer to mate on court at the centre of the gathering, so the male who has battled for and won that will get the majority of females.