Sometimes, choosing black and white to show texture and contrast is more effective than using colour. Here, the contrast between the solids in the geese and the texture in the grasses allows the geese to stand out a little more.
I shot at a focal length of 70, f/5.6 adn shutter speed of f/5.6. The speed was fast enough to stop some of the birds' movement yet allowed the wings to blur. Being able to show both makes this motion composition more interesting. We can almost feel the wind their wings create.