the bird does not attact the attention at all. I had to read the headline and take a very good look at the photo to get an idea of what you were trying to do. and even hen there is nothing intersting to see here.
improment possibilities:
get the bird at a visible size
change your angle
get the bridge out of the picture, or get the bird in the place where your attention is focused by the bridge.
Not sure what the focal point is here, so I don't see that it fits the challange. Would have been good it there was someone fishing/sitting on the grass, or something else to focus on.
I can't really tell what the focus is in this picture. I know you say moor hen, but is it that small blurry bird that just barely stands out? I think I get what you were trying to do, but maybe a little less reflection on the water and more sharpness on the bird.
It took me a good 30 seconds to find the hen, and even then I'm not really sure that's what it is. It could just as well be a chunk of rubble or a hole in the ground. Nothing draws the eye to it, and the rest of the image is both nondescript and slightly blurry, with harsh highlights on the water.