We were reading through your website about mute swans. We have three swans at our office. It looks to us that one is definitely a male mute swan. The other we think are either females or a different variety. The two smaller swans with the lighter bill and smaller knobs on their bill stay together. The male is very territorial and will sometimes run them off.

We were wondering if you could identify from the attached pictures if the other two are female or a different variety or what.