Mute Swans are some of my favorite birds to photograph. They seem sort of expressive in their postures and movement. Plus they are a big subject so easier to see and fill the frame to get a nice image. Plus they do not seem to shy away from you and tend to come right up to where you are shooting. But you can see they keep an eye on you. You just have to make sure you do not blow out the highlights and lose detail in the feathers. Also their wings make a really cool sound when they fly by you!