Female and male penguins do not have specific names and are difficult to tell apart. During mating season it may be possible to differentiate the male from the female because the male often leaves muddy footprints on the back of the female after they have finished mating.
Baby penguins are called chicks or nestlings. According to New Zealand Penguins, there is no official name for a group of penguins, though the International Penguin Conference in 2000 decided upon "waddle." According to Dictionary.com, a group of penguins is called a colony, rookery, parcel or parade.
Emperor penguins are a unique species because typical parental roles are reversed. The female forages for food while the male penguin guards and incubates his mate's egg. The male penguin also produces milk in his esophagus, which is used to feed the newborn chick.