Swan In a Car: 1936 Chesham, Buckinghamshire, England: A pet swan named Leila being helped into a car where it enjoys a ride to the shops. Its owner, Mrs. Watson, says that Leila, who has been a family pet for two years, can open doors and is a good guard dog. Photo by William Vanderson.
Source: Swan In a Car: 1936 Chesham, Buckinghamshire, England
msamba 
I am sure they make good watch “dogs”, they can be very impressively aggressive.
My Grandma told me that their gander was a better watch dog than their Collie.
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