Sphenisciformes are group of flightless birds, highly adapted for life under water. They are found mainly in the Southern Hemisphere and are grouped under one family - Spheniscidae.
Their wings have been developed as flippers to provide propulsion and manouverability under water.
Most penguins feed on krill, fish, squid, and other forms of sealife caught while swimming underwater. They spend about half of their lives on land and half in the oceans.
Modern Penguin are grouped into 6 genera.
Great Penguins (Aptenodytes), Crested Penguins (Eudyptes), Little Penguins (Eudyptula), Yellow-eyed Penguin (Megadyptes), Brush tailed Penguins (Pygoscelis), Banded Penguins (Spheniscus).
The Humboldt Penguin (Spheniscus humboldti) (also termed Peruvian Penguin, or Patranca) is a South American penguin, that breeds in coastal Peru and Chile. Its nearest relatives are the African Penguin, the Magellanic Penguin and the Galápagos Penguin. The penguin is named after the cold water current it swims in, which is itself named after Alexander von Humboldt, an explorer.
More information can be found on Wikipedia.