Northern Mockingbirds abound in Prince Edward Island. Of Course if you hear one, you may not be quite sure. The mocking bird imitates blue jays very well. it also imitates thrushes, wrens, and unhappy robins. They are usually pale grey like in the photo but can sometimes appear to have a bluish tint. They are common all over North America so they are not necessarily a reason to come to PEI. But please do come and enjoy their song . . . even if they are but imitators.
Apparently, they are very smart birds. Smart enough to make sounds like barking dogs or alarm clocks to help give them a feeling of security. They also seem to have the ability to spot a dangerous person in a crowd. So if a mockingbird attacks someone, perhaps you should head the other way :-).