In this series of photos, the subject is placed in different positions in the frame.
1/500 F5.6 ISO 100 Swan in the centre of the photo
1/500 F5.6 ISO 100 Swan towards right edge
1/500 F5.6 ISO 100 Swan towards left edge
1/500 F5.6 ISO 100 Swan towards upper right edge
The picture that is most natural is the swan towards the right edge. The swan still has some lake to swin into, yet the wake is shown.
The least successful picture is the swan in the upper right quadrant. This looks unnatural because there is nowhere for the swan to go.
Had the water been perfectly still, the reflection may have been more pronounced. This may have balanced the picture so the swan may look better in the centre.