Penguin described as hailing from the Falklands. Opus was a comical, "existentialist" penguin character in the cartoons "Bloom County", "Outland" and "Opus". He was also the star in the Christmas show "A Wish for Wings That Work". In the mid-2000s, penguins became one of the most publicized species of animals that form lasting homosexual couples. A children's book, "And Tango Makes Three", was written about one such penguin family in the New York Zoo. Penguin Penguins (order Sphenisciformes, family Spheniscidae) are a group of aquatic, flightless birds. They live almost exclusively in the Southern Hemisphere, with only one species, the Galapagos
Ratite as a whole probably had an origin in the northern hemisphere. Early Cenozoic northern hemisphere paleognaths such as "Lithornis", "Pseudocrypturus", "Paracathartes" and "Palaeotis" appear to be the most basal members of the clade. The various ratite lineages were probably descended from flying ancestors that colonised the south in multiple waves, probably initially in South America, and then evolved gigantism. Loss of flight allows birds to eliminate the energetic cost of maintaining flight-enabling pectoral muscle mass. The basal metabolic rate of volant species is much higher than that of flightless terrestrial birds. But energetic efficiency can only help explain the loss