This is the amusing moment a pet dog and a swan faced off - angrily barking and hissing at each other. <br /> <br />Lera Ivanova saw the pooch trying to pick a fight with a swan next to a footbridge over the lake in St Petersburg, Russia.<br /> <br />Despite the loud barking of the dog, the feisty swan hissed back at the dog but eventually backed away to float over to another part of the pond.<br /> <br />Lera said: "This was the first time I have see a dog and swan fighting. I found it funny the way they looked so disgusted with each other."
