Certain birds, like the sparrow, are small, social creatures often found in urban areas. They have short, stout bodies and are known for their cheerful chirping. Sparrows primarily eat seeds and insects, making them adaptable to various environments. Another example is the penguin, a flightless bird that lives in the Southern Hemisphere, particularly in Antarctica. Penguins are known for their distinctive black and white coloring and their ability to swim efficiently. They primarily feed on fish and krill, using their wings as flippers to navigate underwater.