What species of penguins are in the novel Mr Popper's Penguins?

"There are seventeen species of penguins," according to Drieschman, who finally decided upon Gentoo penguins for the film. "The Gentoos are the third largest of all the penguins, found in the sub-Antarctic and the Falkland Islands, South Georgia and South Chapman's." Ranging in size from about nineteen to twenty-two inches tall, the Gentoos are distinguished by the white stripes across their heads and by their bright orange feet.