Marine life same environmental problems and feeding niches have resulted in similar adaptations. Examples include albatross, penguins, gannets, and auks. In general, marine birds live longer, breed later and have fewer young than terrestrial birds do, but they invest a great deal of time in their young. Most species nest in colonies, which can vary in size from a few dozen birds to millions. Many species are famous for undertaking long annual migrations, crossing the equator or circumnavigating the Earth in some cases. They feed both at the ocean's surface and below it, and even feed on each other. Marine birds can
Southern Hemisphere Indonesia, with 261 million people (roughly 30 million of whom live north of the equator on the northern portions of the islands of Sumatra, Borneo and Sulawesi, while the rest of the population lives in the Southern Hemisphere). Portuguese is the most spoken language in the Southern Hemisphere, followed by Spanish and Javanese. The largest metropolitan areas in the Southern Hemisphere are São Paulo (21 million people), Jakarta (18 million people), Buenos Aires (12 million people), Rio de Janeiro (11 million people), Kinshasa (11 million people) and Sydney (6 million) . The most important financial and commercial centers in the