One might think it is an open - and closed - case that the immediate ancestors of modern birds in the Mesozoic lived alongside the dinosaurs, but it is not that simple. Titanis, a complete specimen recently discovered by Vegavis on the Antarctic island of Vega, is a prehistoric bird that is indisputably related to modern ducks and geese and coexisted with dinosaurs. It is still possible that most chalk birds occupy the same ecological niche as dinosaurs, such as birds of prey or even dinosaurs themselves. During the early Pleistocene, he managed to penetrate the fossil record and it was one of the most important bird species of his time. Despite the unusual habitat of the Vegavis, it is important to remember that tens of millions of years ago Antarctica was much more temperate than it is today and was able to feed a wide variety of animal species. A species of giant bird known as Titanis moved north and colonized the Antarctic Peninsula, where its remains were found in the fossils. This suggests that other species that later migrated north developed in Antarctica. It was assumed that only the giant birds were capable of killing and eating giant armadillos - like mammals, which were also called glyptodons at that time and migrated north. The birds became extinct in the late Pleistocene, around 2.5 million years ago, according to fossil records. The middle Miocene Bullockornis lived carnivorously and seems to belong to the same family as other giant birds like the giant peregrine falcon, but with a different diet. European settlers, who cleared large swathes of woodland in eastern North America and hunted the birds to save them from harvesting, were doomed to extinction by the Carolina parakeet. The later discoveries of an earlier, similar Eoconfuciusornis, made a few years later, were true finds that initially identified the true beak of the prehistoric bird. The fossil discoveries made in China over the last 20 years or so have been spectacular. Based on the hatchets - shaped hatchets of the Carolina parakeet and other giant birds - these terror birds were distant dinosaur offspring that had lost the ability to fly and had adapted to hunting from the ground. Unlike other flying animals, Confucius ornis had teeth that, together with its feathers and curved claws, made it an ideal bird for hunting, which was well suited to sitting in the trees. What brought these terror birds to North America was one of the largest animal exchanges ever on the planet. Large ground carnivorous birds native to South America had developed, including the Carolina Parakeet and other giant birds of prey, but none was as large as the terror bird, which was the largest predator in South America because it was an island on a continent. The first true birds evolved in the late Jurassic period and became the largest birds of prey in North America and the world in general, and even larger than the Carolina parakeet. In this slideshow you will find over 50 prehistoric and recently extinct birds from Archaeopteryx to Pigeon. Many people know the giant moa and the Easter moa when it comes to extinct birds from New Zealand, but not many can call Adzebill or Moa - like birds that are actually more closely related to cranes and grails. Mihirungs by comparing a number of potential relatives by working out the evolutionary history of the giant moor and its relatives. The distant ancestors of Adzebill adapted to their island habitat by becoming large and flightless to hunt food such as fish, insects, and other small mammals. These include giant herbivores that went extinct about 50 million years ago, such as the giant bog and modern giant bogs. These include modern birds such as runabouts, waterfowl, landfill sites and cranes, as well as diving birds that lived during the dinosaur age. Gastornithids in the northern hemisphere that died out 50 to 40 million years ago, such as the giant bogs and modern bog birds. Dromornithsides survived but became extinct after humans arrived in Europe about 65 to 70 million years ago, when the last species, Genyornis newtoni, disappeared. The analysis also included fossils from the fossil record, as well as fossils of modern birds and other animals. It is likely that these memories of the dinosaur age could not stand up to human work, said the study's lead author, Dr. Michael D. Schmitt, a professor of biology at the University of California, Berkeley.