What birds are close to extinction?

* Spix's Macaw (_Cyanopsitta spixii_): This critically endangered parrot is native to Brazil. Only a few individuals remain in the wild, with most living in captivity.

* California Condor (_Gymnogyps californianus_): This critically endangered vulture is native to North America. In the mid-20th century, there were only 22 individuals left, but thanks to captive breeding and reintroduction efforts, the population has grown to over 500 birds.

* Black Rhinoceros (_Diceros bicornis_): This critically endangered rhinoceros is native to Africa. There are only about 5,600 black rhinos left in the wild due to poaching and habitat loss.

* Mountain Gorilla (_Gorilla beringei beringei_): This critically endangered gorilla is native to the Virunga Mountains of Central Africa. There are only about 880 mountain gorillas left in the wild, due to poaching and habitat loss.

* Sumatran Tiger (_Panthera tigris sumatrae_): This critically endangered tiger is native to the island of Sumatra. There are only about 400 Sumatran tigers left in the wild, due to poaching and habitat loss.