They're disease-carriers and extremely aggressive.
Canada Geese have an alamrming tendency to attack humans when they feel their goslings are being threatened. Like we give a sIt about their goslings!
They're SH*T, however, are big and smelly and when a whole flock of Canada geese SH*Ts on your lawn, it's DISGUSTING!
When a Canada goose decides to attack a human, your goose is pretty much cooked. There's no fighting back against a Canada goose. They become like suicide bombers--not caring if they survive the attack--their object is to kill.
First the goose will stand erect, spread its wings and produce a "hissing" sound.
Next, the goose will charge. They are relentless and cannot be frightened away.
The Canada goose may choose to bite or, even more frightening, it may attack you with its wings.
Their wings can kill.
KILL THE CANADA GEESE BEFORE THEY KILL YOU!
And they WILL kill you, if given the chance.