Emphasis is laid on the sheer mass and weight of the animal. Downward brush strokes and dark greys and blacks drag the weight on the lower body while yellows and light strokes make up the back. The brush work fades out at the top of the bison’s hump rather like a mountain top would disappear into the clouds. The comparison with a mountain reinforces the notion that this is a land bound animal, steppes and prairies being its natural habitat.
The animal is being dragged down by its weight and the improbably thin legs look ill adapted to carry its mass.