Is this a joke?

A blonde, a brunette, a redhead, a vicar, a priest, a rabbi, two giraffes and a duck, a farmer, a lawyer, an accountant, a Mexican, an Indian, a Chinaman, an Irishman, an Englishman an American,and a Scotsman walked into a bar.
The barman said, "Hang on a minute, is this some sort of joke?"