Which is the most endangered bird in world?

The most endangered bird in the world is the Spix's Macaw (Cyanopsitta spixii). It is a large parrot found in Brazil. It is critically endangered, with only about 150 individuals left in the wild. The Spix's Macaw is threatened by habitat loss, illegal trade, and competition from other species. Conservation efforts are underway to protect the Spix's Macaw and increase its population.