HOW TO TELL THE DIFFERENCE BETWEEN A MALE AND FEMALE SWAN
Have you ever wondered whether you are looking at a male or female swan? I had often until I learned that the male’s black protuberance at the base of the bill swells during the breeding season. Very recently, I learned that the fleshy black knob has a name. So now rather than calling it a knob, nobble, thingamabob, or that black protuberance above the bill, I can say blackberry, and you can too. That really is an often used term in Europe, their native home. The blackberry is also unique to Mute Swans; no other species of swans has this feature.