6. Palila

It is a native honeycreeper bird from Hawaii that is characterized with its gray back, greenish wings and tail, golden yellow head and breast, and a light shaded belly. It is 19 centimeter long with rounded bill and large finch.
5. Honduran Emerald

It is a hummingbird found in Honduras where its natural habitations are tropical dry shrubland, and tropical dry forests. It measures 9.5 centimeter, colored green, and its medium sized.
4. Kakapo

This is the strangest and one of the rarest nocturnal and flightless Parrots in the world. It is weighed up to 3.5 kilograms or equivalent to 8 pounds. This is found in an island country, New Zealand that is being inhabited by reptiles and birds. It cannot fight and it is very vulnerable to other animals. It is better known as an owl parrot with blotched yellow-green plumage, a large grey beak, distinct facial disc sensory, short length wings, feet, and tail, and vibrissa-like feathers.
3. Orange-Bellied Parrot

It is a specie found in Northern Australia, which inhabits in coastal button grass plains, sedgelands along the creeklines, tea trees, clumps, and at saltmarsh. It is generally a small broad-tailed parrot with orange belly patch, bright grass-green upperparts, and yellow underparts.
2. Red-Crowned Crane

It does not only represent the country of Japan, but the whole continent of Asia. It is also known as the Manchurian Crane or Japanese Crane, which is the largest crane, found in Asia. It symbolizes fidelity, longevity, and luck. It has white primary feathers, with a snowy white and black color on the wings and has a red patch of skin on the crown. It measures 136 centimeters in length and 158 centimeters in height.
1. Asian Crested Ibis

This is a species of bird that is found in Asia specifically in China, Japan, and even the far eastern part of Russia. It is distinct in its appearance with a stunning bushy crest, and red facial skin and legs. It inhabits in tall tress where they create their nesting. They also reside near riverbanks, rice fields, and other reservoirs.
They are not just the rarest birds living on earth but in fact, most of them are considered extinct because of the people who are the primary enemies of these birds.
note:this list is write according to my info,if u want to add u r free to do so