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Elephant birds were members of the extinct ratite family Aepyornithidae, made up of large to enormous flightless birds that once lived on the island of Madagascar. They became extinct, perhaps around 1000–1200 AD, probably as a result of human activity. While they were in close geographical proximity to the ostrich, their closest living relatives are kiwi (found only in New Zealand) https://en.wikipedia.org/wiki/Elephant_bird -
It was a species of moa endemic to New Zealand. It was a member of the ratite family, a type of flightless bird with no keel on the sternum. At less than 1 metre tall and about 17 to 34 kilograms, the upland moa was among the smallest of the moa species. Unlike other moas, it had feathers covering all of its body but the beak and the soles of its feet, The upland moa lived only on New Zealand's South Island, in mountains and sub-alpine regions. https://en.wikipedia.org/wiki/Upland_moa -
It is an extinct marine bird of the cormorant family of seabirds that inhabited Bering Island and possibly other places in the Komandorski Islands and the nearby coast of Kamchatka in the far northeast of Russia. They were large, clumsy and almost flightless and weighed 12–14 pounds, They fed on fish. The population declined quickly after further visitors to the area started collecting the birds for food and feathers. https://en.wikipedia.org/wiki/Spectacled_cormorant -
Estimates say that the passenger pigeon population numbered in the millions—and possibly billions—when the first Europeans began settling in America. MentalFloss reports that Wisconsin was home to largest known nesting site in the late 1800s. Cause of Extinction: humans hunted the pigeon and consumed it to the point of extinction with the last known bird dying in captivity in the Cincinnati Zoo in 1914. https://clck.ru/VKhkh