About 400 species of bird can be found on the mountain in the winter season, almost half of all the species found in Thailand.

Doi Inthanon is an extremely important wintering spot for many migratory bird species that come from Mongolia, Siberia, India, Nepal, and many other places.

Two species - the Ashy-throated warbler and the Chestnut-headed minla - are found nowhere else in the world, and a beautiful race of Green tailed Sunbird is also unique to the mountain top.