Penguins have been changing trough years pass actually are 17 species around the world, but the most important ones are: Humboldt Penguin: This is an average sized penguin with a full-grown weight of no more than 13 pounds. When they mature they will develop a black breast band that help them to swim and hunt. Macaroni Penguin: You will be able to tell Macaroni Penguins from other species due to the colors of the feathers on top of their heads. They are yellow and black and very dark in color. Little Blue Penguin: The Little Blue Penguin is one quite small compared to other species. In fact, it is due to this small size that it is also referred to as the Fairy Penguin. Rockhopper Penguin: With some very colorful feathers on their heads, it is hard to mistake the Rockhopper Penguin for anything else. King Penguin: The King Penguin is very large compared to other species. It is the second largest of them all. Full grown, they can be up to three feet tall and weigh up to 35 pounds. Galapagos Penguin: Classified as one of the smaller species of penguins, the Galapagos are quite interesting. They aren’t more than 5 pounds when fully-grown or taller than 20 inches. African Penguin: The Southern coast of Africa is where you will find the majority of the African Penguins. This species is around the whole continent and humanity know the location of 24 colonies. Emperor Penguin: This penguins are the biggest penguins around the world they are know as Emperor Penguin, the males and females are hard to distinguish as they are very similar is physical size and colors. Adelie Penguin: The Adelie Penguin is one that often looks quite overweight. It is short but wide which tends to give it that appearance. MLA "Alphabetical Listing of the Types of Penguin." PenguinWorld's Home Page. Web. 15 Nov. 2011. . "Rockhopper Penguin." Penguin Facts, Emperor Penguins, Adelie Penguins, King Penguins. Web. 15 Nov. 2011. .