Hustai National Park is a paradise for birdwatchers, with the habitat's diversity having encouraged a rich diversity of bird species. Raptors thrive in the skies above the steppe.

Supported by a large population of rodents, raptors including the Black Vulture (Aegupius monochus), Golden Eagle (Aquila chrysaetos) and Saker Falcon (Falco cherrug) can be observed throughout the day. During recent surveys, 126 bird species were observed in the park. Nineteen of these birds are listed in the Red Book as globally threatened or endangered.

During spring and autumn Hustai National Park (especially the Tuul River valley) is an important stopover location for migratory birds. Most birds migrating through Mongolia breed at Lake Baikal, only 400 km to the north of Hustai National Park in Siberia, which is a significant centre for Asian and European waterbirds.

In spring, the birds are able to feed and recover their strength after crossing over the dry steppe and Gobi desert further south. In autumn, they stop at Hustai's permanent sources of water to prepare for the long, dry return flight ahead. Eighty-six waterbird species have been recorded at the park.

The park supports several Red Book species like the Black Vulture (Aegypius monachus), Bearded Vulture (Gypaetus barbatus), Imperial Eagle (Aquila heliaca), Steppe Eagle (Aquila ropax), Golden Eagle (Aquila chrysaetos), Great Bustard (Otis tardo), Bar-headed Goose (Anser indicus), Demoiselle Crane (Anthropoides virgo), Osprey (Pandion haliaetus), White-tailed Sea-eagle (Haeliaeetus albicilla), Upland Buzzard (Buteo hemilasius), Saker Falcon (Falco cherrug), Peregrine Falcon (Falco peregrinus), Lanner Falcon (Falco biarmicus), Gyrfalcon (Falco rusticolus), Black Stork (Ciconia nigra), Common Crane (Grus grus), White-naped Crane (Grus vipio) and Hooded Crane (Grus monachus).