Probably because the duck is creating them.
I think monochrome worked really well for this photo and I think that has a bit to do with the overall lighting. Also, it almost looks like the duck is sitting at a lower level of water which I think is neat.
This is my submission into Leanne Cole‘s “Monochrome Madness” for this week.
I suggest checking out Leanne’s photography, as well as checking out what other people submit.
A lot of what people are submitting will likely end up here.
I hope you enjoy.